envsetup: Kill Jack args export

Jack is dead since O.

Change-Id: I46e2102de025cbe141fb08f0edfb7d24ee3b7e91
diff --git a/build/envsetup.sh b/build/envsetup.sh
index c854a96..ef6cbde 100644
--- a/build/envsetup.sh
+++ b/build/envsetup.sh
@@ -996,8 +996,3 @@
             ;;
     esac
 fi
-
-# Android specific JACK args
-if [ -n "$JACK_SERVER_VM_ARGUMENTS" ] && [ -z "$ANDROID_JACK_VM_ARGS" ]; then
-    export ANDROID_JACK_VM_ARGS=$JACK_SERVER_VM_ARGUMENTS
-fi