[Build] Remove unused creation of missing sources in Maven publication

Since [1] respectively [2] no missing source artifacts are created
anymore so the associated part of the CBIaggregator.sh script can be
cleaned-up.

[1] - eclipse-platform/eclipse.platform.releng#126
[2] - eclipse-platform/eclipse.platform.releng#167

JenkinsJobs/Releng/publishToMaven.jenkinsfile

@@ -169,7 +169,7 @@ pipeline {
 	post {
 		always {
 			archiveArtifacts allowEmptyArchive: true, artifacts: '\
-				repo/**, baseline-next.txt, \
+				repo/**, \
 				repo-validation/coordinates.txt'
 		}
 		unsuccessful {

eclipse.platform.releng/publish-to-maven-central/CBIaggregator.sh

@@ -336,52 +336,4 @@ createJavadocs jdt org.eclipse.jdt:org.eclipse.jdt.doc.isv
 createJavadocs pde org.eclipse.pde:org.eclipse.pde.doc.user
 popd
 
-echo "==== Create missing sources artifacts ===="
-
-function buildSourceJar() {
-	if [ -d assemble ]
-	then
-		rm -r assemble
-	fi
-	mkdir assemble
-	[email protected]:${1}
-	gitcache_dir=${WORKING_ROOT}/gitcache
-	gitpath=${gitcache_dir}/repo/${2}
-	gittag=${3}
-	group=${4}
-	artifact=${5}
-	version=${6}
-	mkdir -p $gitcache_dir
-	pushd ${gitcache_dir}
-		git clone ${giturl} repo
-		pushd repo
-			git checkout ${3}
-		popd
-	popd
-	mv ${gitpath}/src/* assemble/
-	mv ${gitpath}/META-INF assemble/
-	if [ -d ${gitpath}/OSGI-INF ]
-	then
-		mv ${gitpath}/OSGI-INF assemble/
-	fi
-	mv ${gitpath}/about.html assemble/
-	if [ $# > 6 ]
-	then
-		shift 6
-		for src in "$@"
-		do
-			mv "${gitpath}/${src}" assemble/ 
-		done
-	fi
-	rm -rf ${gitcache_dir}
-	pushd assemble
-	jar cf ../${group}/${artifact}/${version}/${artifact}-${version}-sources.jar *
-	popd
-}
-
-while read line
-do
-    buildSourceJar $line 
-done < ${BASE_DIR}/sourceBundles.txt
-
 echo "========== Repo completed ========="