Remove strange, unused API

https://github.com/SmartfaceIO/smartface.language/search?q=getterndefnames&type=Code is empty

package.json

@@ -63,7 +63,7 @@
         "c9.ide.language.javascript": "#2b77bdb96a",
         "c9.ide.language.javascript.immediate": "#0535804ada",
         "c9.ide.language.javascript.eslint": "#3ec4557969",
-        "c9.ide.language.javascript.tern": "#be63b45ddc",
+        "c9.ide.language.javascript.tern": "#555df28c1f",
         "c9.ide.language.javascript.infer": "#b15bdb1744",
         "c9.ide.language.jsonalyzer": "#45453961d9",
         "c9.ide.collab": "#30efed939e",