Extensions Cleanup (#359)

* clean up extensions

* updated copyrights

* formatting

package.json

@@ -36,8 +36,6 @@
     "angular2-slickgrid": "git://github.com/Microsoft/angular2-slickgrid.git#1.3.5",
     "applicationinsights": "0.17.1",
     "chart.js": "^2.6.0",
-    "chokidar": "bpasero/chokidar#vscode",
-    "comment-json": "^1.1.3",
     "core-js": "^2.4.1",
     "emmet": "ramya-rao-a/emmet#vscode",
     "error-ex": "^1.3.0",
@@ -47,13 +45,11 @@
     "gc-signals": "^0.0.1",
     "getmac": "1.0.7",
     "graceful-fs": "4.1.11",
-    "html-query-plan": "git://github.com/anthonydresser/html-query-plan.git#v2.2.5",
+    "html-query-plan": "git://github.com/anthonydresser/html-query-plan.git#2.2.5",
     "http-proxy-agent": "0.2.7",
     "https-proxy-agent": "0.3.6",
     "iconv-lite": "0.4.15",
     "jquery": "^2.2.0",
-    "jquery-ui": "^1.12.1",
-    "jquery.event.drag": "2.2.2",
     "make-error": "^1.1.1",
     "jschardet": "^1.5.1",
     "keytar": "^4.0.5",
@@ -74,6 +70,7 @@
     "systemjs": "0.19.40",
     "underscore": "^1.8.3",
     "v8-profiler": "jrieken/v8-profiler#vscode",
+    "vscode-chokidar": "1.6.2",
     "vscode-debugprotocol": "1.24.0",
     "vscode-ripgrep": "0.6.0-patch.0.2",
     "vscode-textmate": "^3.2.0",
@@ -150,7 +147,6 @@
     "typescript-formatter": "4.0.1",
     "uglify-js": "mishoo/UglifyJS2#harmony-v2.8.22",
     "uglify-es": "^3.0.18",
-    "underscore": "^1.8.2",
     "vinyl": "^0.4.5",
     "vinyl-fs": "^2.4.3",
     "vsce": "^1.25.1",