remove emma

since it seems no longer used.

Change-Id: I08c5a1a744abb9d9b746f6b17b937be3af53b65f
diff --git a/linux-x86_64/kythe/extractors/vnames.json b/linux-x86_64/kythe/extractors/vnames.json
index f6eacdf..bb6e5f8 100644
--- a/linux-x86_64/kythe/extractors/vnames.json
+++ b/linux-x86_64/kythe/extractors/vnames.json
@@ -24,14 +24,6 @@
     }
   },
   {
-    "pattern":"external/emma/(.*)",
-    "vname":{
-      "path":"@1@",
-      "corpus":"googleplex-android",
-      "root":"platform/external/emma"
-    }
-  },
-  {
     "pattern":"external/gmock/(.*)",
     "vname":{
       "path":"@1@",