Revert "Workaround JDWP failures"

This reverts commit 8af4d1c84682a3108b1e5b66fd7442a69eb715c0.

Bug: 27262745
Change-Id: I4254fad87cfdd2f9c044722c2f5766c8b14aaa9c
diff --git a/tools/run-jdwp-tests.sh b/tools/run-jdwp-tests.sh
index fda630f..e4af9fa 100755
--- a/tools/run-jdwp-tests.sh
+++ b/tools/run-jdwp-tests.sh
@@ -133,7 +133,7 @@
       --vm-arg -Djpda.settings.transportAddress=127.0.0.1:55107 \
       --vm-arg -Djpda.settings.debuggeeJavaPath="$art_debugee $image $debuggee_args" \
       --classpath $test_jack \
-      --toolchain jack \
+      --toolchain jack --language JN \
       --vm-arg -Xcompiler-option --vm-arg --debuggable \
       $test