Removes unnecessary subscriptions on invalid blame

Removes duplicate lint rule
Switches on-demand CodeLens to be a global toggle

tslint.json

@@ -21,9 +21,6 @@
         "no-unsafe-finally": true,
         "no-unused-expression": false,
         "no-unused-new": true,
-        "no-unused-variable": [
-            true
-        ],
         "no-var-keyword": true,
         "no-var-requires": false,
         "object-literal-key-quotes": [