Don't create .gradle folder early

See gh-37450

ci/images/setup.sh

@@ -51,9 +51,3 @@ curl -L https://github.com/progrium/entrykit/releases/download/v${ENTRYKIT_VERSI
 chmod +x entrykit && \
 mv entrykit /bin/entrykit && \
 entrykit --symlink
-
-###########################################################
-# GRADLE ENTERPRISE
-###########################################################
-mkdir ~/.gradle
-echo 'systemProp.user.name=concourse' > ~/.gradle/gradle.properties

ci/scripts/common.sh

@@ -1,12 +1,10 @@
 source /opt/concourse-java.sh
 
-if [[ -d $PWD/gradle ]]; then
-	export GRADLE_USER_HOME=`pwd`/gradle
-fi
-
 setup_symlinks
 if [[ -d $PWD/embedmongo && ! -d $HOME/.embedmongo ]]; then
 	ln -s "$PWD/embedmongo" "$HOME/.embedmongo"
 fi
 
 cleanup_maven_repo "org.springframework.boot"
+
+echo 'systemProp.user.name=concourse' > ~/.gradle/gradle.properties