removed coverage for sequelize v3 due to arbitrary appearing nyc error

Author: RobinBuschmann

package-lock.json

@@ -14,8 +14,7 @@
     "cover-v4": "npm run prepare-test-v4 && nyc --exclude lib/models/v3/**/*.js mocha",
     "exec-tests": "mocha test/specs/",
     "test": "npm run test-v4 && npm run test-v3",
-    "clean-nyc": "rimraf .nyc_output && rimraf coverage && npm install",
-    "cover": "npm run clean-nyc && npm run cover-v4 && npm run clean-nyc && npm run cover-v3",
+    "cover": "npm run cover-v4",
     "lint": "tslint ."
   },
   "repository": {
@@ -71,7 +70,6 @@
     "nyc": "11.2.1",
     "prettyjson": "1.2.1",
     "reflect-metadata": "0.1.9",
-    "rimraf": "2.6.2",
     "sinon": "1.17.7",
     "sinon-chai": "2.8.0",
     "source-map-support": "0.4.14",