[Build] Remove testConfigs.php file that is generated in I-/Y-builds

The 'testConfigs.php' is regenerated respectively immediately
overwritten during an I-/Y-build in the 'Gather Eclipse Parts' stage,
which calls via the 'gatherEclipseParts.sh' script the 'publish' target
in the 'org.eclipse.platform.releng.tychoeclipsebuilder/eclipse/helper.xml'
ANT-script. Within that the 'generateIndex' target of the
'cje-production/scripts/publish.xml' ANT-script is called. Eventually
this calls
org.eclipse.releng.generators.TestResultsGenerator.getTestsConfig(),
which regenerates the 'testConfigs.php'.

And since 'testConfigs.php' is generated from the already existing list
of ran test-configurations there is no need to maintain it manually
again.

Author: HannesWell

JenkinsJobs/YBuilds/Y_build.groovy

@@ -210,8 +210,6 @@ spec:
           steps {
                     sh \'\'\'
                         cd ${WORKSPACE}/eclipse.platform.releng.aggregator/eclipse.platform.releng.aggregator/cje-production/Y-build
-                        cp testConfigs.php ${WORKSPACE}/eclipse.platform.releng.aggregator/eclipse.platform.releng.aggregator/cje-production/gitCache/eclipse.platform.releng.aggregator/eclipse.platform.releng.tychoeclipsebuilder/eclipse/publishingFiles/staticDropFiles/.
-                        cp testConfigs.php ${WORKSPACE}/eclipse.platform.releng.aggregator/eclipse.platform.releng.aggregator/eclipse.platform.releng.tychoeclipsebuilder/eclipse/publishingFiles/staticDropFiles/.
                         cp publish.xml ${WORKSPACE}/eclipse.platform.releng.aggregator/eclipse.platform.releng.aggregator/cje-production/gitCache/eclipse.platform.releng.aggregator/eclipse.platform.releng.tychoeclipsebuilder/eclipse/buildScripts/.
                         cp publish.xml ${WORKSPACE}/eclipse.platform.releng.aggregator/eclipse.platform.releng.aggregator/eclipse.platform.releng.tychoeclipsebuilder/eclipse/buildScripts/.
                     \'\'\'