Remove getLatestRevision as we don't use it

package.json

@@ -71,7 +71,7 @@
         "c9.ide.language.javascript.infer": "#18acb93a3a",
         "c9.ide.language.jsonalyzer": "#d8183d84b4",
         "c9.ide.language.codeintel": "#fc867feec4",
-        "c9.ide.collab": "#1ea29be441",
+        "c9.ide.collab": "#d6dc9b0632",
         "c9.ide.local": "#10eb45842a",
         "c9.ide.find": "#e33fbaed2f",
         "c9.ide.find.infiles": "#c0a13737ef",