Remove the unused jar from the script

jar has been removed, ensure we don't look for it.

Test: ./cts-tradefed
Bug: 118297021
Bug: 118438831
Change-Id: I666d021840bb46c7496e4732261260db5e49d133
(cherry picked from commit cda44a471ace2f1832e6be92f50e4a375e1e6ed5)
diff --git a/tools/cts-tradefed/etc/cts-tradefed b/tools/cts-tradefed/etc/cts-tradefed
index 9999780..5a8f53c 100755
--- a/tools/cts-tradefed/etc/cts-tradefed
+++ b/tools/cts-tradefed/etc/cts-tradefed
@@ -93,8 +93,7 @@
   cts-tradefed
   cts-tradefed-tests
   compatibility-common-util-tests
-  compatibility-tradefed-tests
-  host-libprotobuf-java-full"
+  compatibility-tradefed-tests"
 
 for JAR in $JARS; do
     checkFile ${JAR_DIR}/${JAR}.jar