Fix comment for intelliSenseEngine setting. (#2720)

Author: sean-mcmanus

Extension/package.json

@@ -108,7 +108,7 @@
             "Disabled"
           ],
           "default": "Default",
-          "description": "Controls the IntelliSense provider. \"Tag Parser\" provides \"fuzzy\" results that are not context-aware. \"Default\" provides context-aware results and is in preview mode - member list, hover tooltips, and error squiggles are currently implemented. Features not yet implemented in the new default engine will use the tag parser engine instead.",
+          "description": "Controls the IntelliSense provider. \"Tag Parser\" provides \"fuzzy\" results that are not context-aware. \"Default\" provides context-aware results. \"Disabled\" turns off C/C++ language service features.",
           "scope": "resource"
         },
         "C_Cpp.intelliSenseEngineFallback": {