THRIFT-3453 remove rat_exclude

remove rat_exclude from EXTRA_DIST
diff --git a/Makefile.am b/Makefile.am
index 812a40a..796aa99 100755
--- a/Makefile.am
+++ b/Makefile.am
@@ -102,7 +102,6 @@
 	doap.rdf \
 	json-schema.json \
 	package.json \
-	rat_exclude \
 	sonar-project.properties \
 	LICENSE \
 	CHANGES \