Cleanup pom, use bom where possible (#244)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Tim Jacomb <[email protected]>

pom.xml

@@ -19,8 +19,6 @@
         <jenkins.version>2.222.4</jenkins.version>
         <java.level>8</java.level>
         <no-test-jar>false</no-test-jar>
-        <configuration-as-code.version>1.46</configuration-as-code.version>
-        <checks-api.version>1.4.1</checks-api.version>
     </properties>
     <licenses>
         <license>
@@ -50,36 +48,24 @@
         <dependency>
             <groupId>io.jenkins.plugins</groupId>
             <artifactId>echarts-api</artifactId>
-            <version>4.9.0-3</version>
         </dependency>
         <dependency>
             <groupId>io.jenkins.plugins</groupId>
             <artifactId>checks-api</artifactId>
-            <version>${checks-api.version}</version>
         </dependency>
         <dependency>
             <groupId>io.jenkins.plugins</groupId>
             <artifactId>checks-api</artifactId>
-            <version>${checks-api.version}</version>
             <scope>test</scope>
             <classifier>tests</classifier>
         </dependency>
         <dependency>
             <groupId>io.jenkins.plugins</groupId>
             <artifactId>plugin-util-api</artifactId>
-            <version>1.6.1</version>
-            <exclusions>
-                <!-- TODO https://github.com/jenkinsci/analysis-pom-plugin/pull/153 -->
-                <exclusion>
-                    <groupId>commons-io</groupId>
-                    <artifactId>commons-io</artifactId>
-                </exclusion>
-            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>display-url-api</artifactId>
-            <version>2.3.4</version>
         </dependency>
         <dependency>
             <groupId>io.jenkins.plugins</groupId>
@@ -90,11 +76,6 @@
         <dependency>
             <groupId>io.jenkins.plugins</groupId>
             <artifactId>bootstrap4-api</artifactId>
-            <version>4.5.3-2</version>
-        </dependency>
-        <dependency>
-            <groupId>org.jenkins-ci.plugins</groupId>
-            <artifactId>structs</artifactId>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
@@ -148,7 +129,6 @@
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>pipeline-stage-step</artifactId>
-            <version>2.5</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -188,13 +168,11 @@
         <dependency>
             <groupId>io.jenkins</groupId>
             <artifactId>configuration-as-code</artifactId>
-            <version>${configuration-as-code.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>io.jenkins.configuration-as-code</groupId>
             <artifactId>test-harness</artifactId>
-            <version>${configuration-as-code.version}</version>
             <scope>test</scope>
             <!-- TODO bump version in jcasc -->
             <exclusions>
@@ -204,11 +182,9 @@
                 </exclusion>
             </exclusions>
         </dependency>
-        <!-- TODO https://github.com/jenkinsci/bom/pull/294 -->
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>jackson2-api</artifactId>
-            <version>2.12.1</version>
         </dependency>
     </dependencies>
     <dependencyManagement>