Remove timezone tests from ART script.

Now that the tests have moved to the I18N module.

Test: run-libcore-tests
Change-Id: I9ae1ca47f044d1dcc5a8d04d6433aa01940dac31
diff --git a/tools/run-libcore-tests.sh b/tools/run-libcore-tests.sh
index 59c05ec..f7c8e27 100755
--- a/tools/run-libcore-tests.sh
+++ b/tools/run-libcore-tests.sh
@@ -112,7 +112,6 @@
                   "libcore.libcore.net"
                   "libcore.libcore.reflect"
                   "libcore.libcore.util"
-                  "libcore.libcore.timezone"
                   "libcore.sun.invoke"
                   "libcore.sun.net"
                   "libcore.sun.misc"