tools/buildbot-build.sh: Remove javalibcoretest from common targets

It's built in the make command

Change-Id: I702d54c38dd4492e19688d3949c1e610865d9260
diff --git a/tools/buildbot-build.sh b/tools/buildbot-build.sh
index 5cc29d0..da7131c 100755
--- a/tools/buildbot-build.sh
+++ b/tools/buildbot-build.sh
@@ -19,7 +19,7 @@
   exit 1
 fi
 
-common_targets="vogar vogar.jar core-tests apache-harmony-jdwp-tests-hostdex out/host/linux-x86/bin/adb jsr166-tests libjavacoretests conscrypt-tests"
+common_targets="vogar vogar.jar core-tests apache-harmony-jdwp-tests-hostdex out/host/linux-x86/bin/adb jsr166-tests conscrypt-tests"
 android_root="/data/local/tmp/system"
 linker="linker"
 mode="target"