Remove duplicate rimraf

Author: cncolder

template/package.json

@@ -24,7 +24,6 @@
     "portfinder": "^1.0.13",
     "postcss-mpvue-wxss": "^1.0.0",
     "px2rpx-loader": "^0.1.8",
-    "rimraf": "^2.6.2",
     "babel-core": "^6.22.1",
     "glob": "^7.1.2",
     "webpack-mpvue-asset-plugin": "^0.0.1",