diff --git a/buildhelpers/src/main/java/com/vaadin/buildhelpers/GeneratePackageExports.java b/buildhelpers/src/main/java/com/vaadin/buildhelpers/GeneratePackageExports.java
deleted file mode 100644
index 9717c353531..00000000000
--- a/buildhelpers/src/main/java/com/vaadin/buildhelpers/GeneratePackageExports.java
+++ /dev/null
@@ -1,224 +0,0 @@
-/*
- * Copyright 2000-2016 Vaadin Ltd.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
-package com.vaadin.buildhelpers;
-
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Enumeration;
-import java.util.HashSet;
-import java.util.List;
-import java.util.jar.Attributes;
-import java.util.jar.JarEntry;
-import java.util.jar.JarFile;
-import java.util.jar.Manifest;
-import java.util.logging.Logger;
-import java.util.regex.Pattern;
-
-/**
- * Generates Export-Packages attribute for OSGi compatible manifest.
- * <p>
- * Reads the included Java packages in a jar file, generates a corresponding
- * Export-Package attribute, and appends it to the jar's MANIFEST.MF.
- * <p>
- * See #3521 for details.
- *
- * @author magi
- */
-public class GeneratePackageExports {
-
-    private static final String EXPORT_PACKAGE_ATTRIBUTE = "Export-Package";
-
-    public static void main(String[] args) {
-        if (args.length < 2) {
-            System.err.println("Invalid number of parameters\n"
-                    + "Usage: java -cp .. GenerateManifest <package.jar> <accepted package prefixes>\n"
-                    + "Use -Dvaadin.version to specify the version to be used for the packages\n"
-                    + "Use -DincludeNumberPackages=1 to include package names which start with a number (not 100% OSGi compatible)");
-            System.exit(1);
-        }
-
-        // Open the JAR
-        String jarFilename = args[0];
-        JarFile jar = null;
-        try {
-            jar = new JarFile(jarFilename);
-        } catch (IOException e) {
-            System.err.println("Unable to open JAR '" + jarFilename + "'");
-            System.exit(1);
-        }
-
-        // Accepted packages
-        List<String> acceptedPackagePrefixes = new ArrayList<>();
-        for (int i = 1; i < args.length; i++) {
-            acceptedPackagePrefixes.add(args[i]);
-        }
-
-        boolean includeNumberPackages = false;
-        if ("1".equals(System.getProperty("includeNumberPackages"))) {
-            includeNumberPackages = true;
-        }
-
-        // List the included Java packages
-        HashSet<String> packages = getPackages(jar, acceptedPackagePrefixes,
-                includeNumberPackages);
-
-        // Avoid writing empty Export-Package attribute
-        if (packages.isEmpty()) {
-            return;
-        }
-
-        String exportPackage = sortAndJoinPackages(packages);
-
-        // Read old manifest
-        Manifest oldMF = null;
-        try {
-            oldMF = jar.getManifest();
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-        Attributes mainAttributes = oldMF.getMainAttributes();
-
-        String existingExportPackage = mainAttributes
-                .getValue(EXPORT_PACKAGE_ATTRIBUTE);
-        if (existingExportPackage != null) {
-            exportPackage = existingExportPackage + "," + exportPackage;
-        }
-
-        // Jar must be closed before updating it below, as it's
-        // locked in Windows until closed. (#6045)
-        try {
-            jar.close();
-        } catch (IOException e) {
-            System.err.println("Unable to close JAR '" + jarFilename + "'");
-        }
-
-        // Create the modified manifest
-        ManifestWriter manifest = new ManifestWriter();
-        manifest.writeAttribute(EXPORT_PACKAGE_ATTRIBUTE, exportPackage);
-
-        // Update the manifest in the Jar. The jar must be closed
-        // before this is done.
-        int status = manifest.updateJar(jarFilename);
-
-        if (status != 0) {
-            System.exit(status);
-        }
-    }
-
-    private static String sortAndJoinPackages(HashSet<String> packages) {
-        // Produce an ordered listing of the package names
-        String packageArray[] = new String[packages.size()];
-        packages.toArray(packageArray);
-        Arrays.sort(packageArray);
-        StringBuilder joinedPackages = new StringBuilder();
-        for (int i = 0; i < packageArray.length; i++) {
-            if (i != 0) {
-                joinedPackages.append(",");
-            }
-            String version = getVersion(packageArray[i]);
-            String packageAndVersion = packageArray[i];
-            if (version != null) {
-                packageAndVersion += ";version=\"" + version + "\"";
-            } else {
-                Logger.getLogger(GeneratePackageExports.class.getName())
-                        .severe("No version defined for " + packageArray[i]);
-            }
-            joinedPackages.append(packageAndVersion);
-        }
-
-        return joinedPackages.toString();
-    }
-
-    /**
-     * Tries to find version specified using system properties of type
-     * version.<java package>. Searches for the packge and then its parents
-     * recursively. Falls back to the "vaadin.version" system property if no
-     * other properties are found.
-     *
-     * @param javaPackage
-     *            The package to determine a version for
-     * @return A version or null if no version has been defined
-     */
-    private static String getVersion(String javaPackage) {
-        String packageVersion = System.getProperty("version." + javaPackage);
-        if (packageVersion != null) {
-            return packageVersion;
-        }
-        String parentPackage = null;
-        if (javaPackage.contains(".")) {
-            parentPackage = javaPackage.substring(0,
-                    javaPackage.lastIndexOf('.'));
-            String parentVersion = getVersion(parentPackage);
-            if (parentVersion != null) {
-                return parentVersion;
-            }
-        }
-
-        String vaadinVersion = System.getProperty("vaadin.version");
-        if (vaadinVersion != null) {
-            return vaadinVersion;
-        }
-
-        return null;
-    }
-
-    private static HashSet<String> getPackages(JarFile jar,
-            List<String> acceptedPackagePrefixes,
-            boolean includeNumberPackages) {
-        HashSet<String> packages = new HashSet<>();
-
-        Pattern startsWithNumber = Pattern.compile("\\.\\d");
-
-        for (Enumeration<JarEntry> it = jar.entries(); it.hasMoreElements();) {
-            JarEntry entry = it.nextElement();
-
-            boolean classFile = entry.getName().endsWith(".class");
-            boolean directory = entry.isDirectory();
-
-            if (!classFile && !directory) {
-                continue;
-            }
-
-            if (!acceptEntry(entry.getName(), acceptedPackagePrefixes)) {
-                continue;
-            }
-
-            int lastSlash = entry.getName().lastIndexOf('/');
-            String pkg = entry.getName().substring(0, lastSlash).replace('/',
-                    '.');
-
-            if (!includeNumberPackages
-                    && startsWithNumber.matcher(pkg).find()) {
-                continue;
-            }
-
-            packages.add(pkg);
-        }
-
-        return packages;
-    }
-
-    private static boolean acceptEntry(String name,
-            List<String> acceptedPackagePrefixes) {
-        for (String prefix : acceptedPackagePrefixes) {
-            if (name.startsWith(prefix)) {
-                return true;
-            }
-        }
-        return false;
-    }
-}