Add offWatchDirChange() for symmetry

package.json

@@ -55,7 +55,7 @@
         "c9"
     ],
     "c9plugins": {
-        "c9.ide.language": "#3ed8ee7522",
+        "c9.ide.language": "#25f2a6a76c",
         "c9.ide.language.css": "#ef8a28943e",
         "c9.ide.language.generic": "#77d43cfaf0",
         "c9.ide.language.html": "#99efa2853f",
@@ -65,7 +65,7 @@
         "c9.ide.language.javascript.eslint": "#08e0af061f",
         "c9.ide.language.javascript.tern": "#3ef5101eec",
         "c9.ide.language.javascript.infer": "#4c9a4282ff",
-        "c9.ide.language.jsonalyzer": "#0085edb2e5",
+        "c9.ide.language.jsonalyzer": "#6bf0b51012",
         "c9.ide.collab": "#b49eda3791",
         "c9.ide.local": "#a9703b630c",
         "c9.ide.find": "#6cc6d3379d",