remove shelljs

package.json

@@ -39,7 +39,6 @@
     "@types/gulp-mocha": "0.0.29",
     "@types/gulp-sourcemaps": "0.0.29",
     "@types/minimatch": "^2.0.29",
-    "@types/shelljs": "^0.3.33",
     "@types/through2": "^2.0.32",
     "beautylog": "6.0.0",
     "depcheck": "^0.6.7",
@@ -54,7 +53,6 @@
     "lodash": "^4.17.4",
     "npmextra": "^2.0.3",
     "projectinfo": "3.0.1",
-    "shelljs": "^0.7.6",
     "smartchok": "^1.0.4",
     "smartcli": "2.0.1",
     "smartcov": "1.0.0",