typings - remove manifest json that no longer seems to be required

src/typings/cgmanifest.json

-{
-	"registrations": [
-		{
-			"component": {
-				"type": "git",
-				"git": {
-					"name": "definitelytyped",
-					"repositoryUrl": "https://github.com/DefinitelyTyped/DefinitelyTyped",
-					"commitHash": "69e3ac6bec3008271f76bbfa7cf69aa9198c4ff0"
-				}
-			},
-			"license": "MIT"
-		}
-	],
-	"version": 1
-}