diff --git a/core/deployment/src/main/java/io/quarkus/deployment/ExtensionLoader.java b/core/deployment/src/main/java/io/quarkus/deployment/ExtensionLoader.java
index 6f60dc9057760..c540ab7d0438a 100644
--- a/core/deployment/src/main/java/io/quarkus/deployment/ExtensionLoader.java
+++ b/core/deployment/src/main/java/io/quarkus/deployment/ExtensionLoader.java
@@ -128,8 +128,7 @@ private static boolean isRecorder(AnnotatedElement element) {
      * @throws ClassNotFoundException if a build step class is not found
      */
     public static Consumer<BuildChainBuilder> loadStepsFrom(ClassLoader classLoader, Properties buildSystemProps,
-            ApplicationModel appModel, LaunchMode launchMode, DevModeType devModeType,
-            Consumer<ConfigBuilder> configCustomizer)
+            ApplicationModel appModel, LaunchMode launchMode, DevModeType devModeType)
             throws IOException, ClassNotFoundException {
         // populate with all known types
         List<Class<?>> roots = new ArrayList<>();
@@ -167,9 +166,6 @@ public static Consumer<BuildChainBuilder> loadStepsFrom(ClassLoader classLoader,
             builder.withSources(ds1, ds2, platformConfigSource, pcs);
         }
 
-        if (configCustomizer != null) {
-            configCustomizer.accept(builder);
-        }
         final SmallRyeConfig src = builder.build();
 
         // install globally
diff --git a/core/deployment/src/main/java/io/quarkus/deployment/QuarkusAugmentor.java b/core/deployment/src/main/java/io/quarkus/deployment/QuarkusAugmentor.java
index 832d8b3187eaa..f1db8cfd53339 100644
--- a/core/deployment/src/main/java/io/quarkus/deployment/QuarkusAugmentor.java
+++ b/core/deployment/src/main/java/io/quarkus/deployment/QuarkusAugmentor.java
@@ -57,7 +57,6 @@ public class QuarkusAugmentor {
     private final Path targetDir;
     private final ApplicationModel effectiveModel;
     private final String baseName;
-    private final Consumer<ConfigBuilder> configCustomizer;
     private final boolean rebuild;
     private final boolean auxiliaryApplication;
     private final Optional<DevModeType> auxiliaryDevModeType;
@@ -76,7 +75,6 @@ public class QuarkusAugmentor {
         this.targetDir = builder.targetDir;
         this.effectiveModel = builder.effectiveModel;
         this.baseName = builder.baseName;
-        this.configCustomizer = builder.configCustomizer;
         this.deploymentClassLoader = builder.deploymentClassLoader;
         this.rebuild = builder.rebuild;
         this.devModeType = builder.devModeType;
@@ -106,7 +104,7 @@ public BuildResult run() throws Exception {
             //in additional stuff from the deployment leaking in, this is unlikely but has a bit of a smell.
             ExtensionLoader.loadStepsFrom(deploymentClassLoader,
                     buildSystemProperties == null ? new Properties() : buildSystemProperties,
-                    effectiveModel, launchMode, devModeType, configCustomizer)
+                    effectiveModel, launchMode, devModeType)
                     .accept(chainBuilder);
 
             Thread.currentThread().setContextClassLoader(classLoader);
@@ -202,7 +200,6 @@ public static final class Builder {
 
         ApplicationModel effectiveModel;
         String baseName = "quarkus-application";
-        Consumer<ConfigBuilder> configCustomizer;
         ClassLoader deploymentClassLoader;
         DevModeType devModeType;
         boolean test;
@@ -341,10 +338,5 @@ public Builder setDeploymentClassLoader(ClassLoader deploymentClassLoader) {
             this.deploymentClassLoader = deploymentClassLoader;
             return this;
         }
-
-        public Builder setConfigCustomizer(Consumer<ConfigBuilder> configCustomizer) {
-            this.configCustomizer = configCustomizer;
-            return this;
-        }
     }
 }