remove cross-env where not needed

Author: rsavian

Diff for: package.json

@@ -4,27 +4,27 @@
   "description": "Simple React Hot Loading example with Hapi Server-side rendering",
   "scripts": {
     "---------- HELPERS -----------------------------------------------------------------------------": "",
-    "remove": "cross-env rimraf dist",
-    "buildServer": "cross-env tsc -project tsconfig.server.json",
-    "watchServer": "cross-env tsc -watch -project tsconfig.server.json",
-    "removeAndBuildServer": "cross-env npm run remove && npm run buildServer",
+    "remove": "rimraf dist",
+    "buildServer": "tsc -project tsconfig.server.json",
+    "watchServer": "tsc -watch -project tsconfig.server.json",
+    "removeAndBuildServer": "npm run remove && npm run buildServer",
     "start": "cross-env NODE_ENV=production node ./dist/server.js",
     "---------- DEVELOPMENT -------------------------------------------------------------------------": "",
-    "predev": "cross-env npm run removeAndBuildServer",
-    "dev": "cross-env npm run watchServer & npm run devServer",
+    "predev": "npm run removeAndBuildServer",
+    "dev": "npm run watchServer & npm run devServer",
     "devServer": "cross-env BABEL_ENV=client NODE_ENV=development nodemon ./dist/server.js",
     "---------- STAGING -----------------------------------------------------------------------------": "",
-    "prestaging:build": "cross-env npm run removeAndBuildServer",
+    "prestaging:build": "npm run removeAndBuildServer",
     "staging:build": "cross-env BABEL_ENV=client NODE_ENV=staging webpack",
-    "staging": "cross-env npm run staging:build && npm run start",
+    "staging": "npm run staging:build && npm run start",
     "---------- PRODUCTION --------------------------------------------------------------------------": "",
-    "preprod:build": "cross-env npm run removeAndBuildServer",
+    "preprod:build": "npm run removeAndBuildServer",
     "prod:build": "cross-env BABEL_ENV=client NODE_ENV=production webpack -p",
-    "prod": "cross-env npm run prod:build && npm run start",
+    "prod": "npm run prod:build && npm run start",
     "---------- TESTING -----------------------------------------------------------------------------": "",
-    "test": "cross-env npm run lint && npm run unit",
-    "lint": "cross-env tslint 'src/**/*.ts{,x}' --exclude 'src/_declare/**/*'",
-    "unit": "cross-env jest",
+    "test": "npm run lint && npm run unit",
+    "lint": "tslint 'src/**/*.ts{,x}' --exclude 'src/_declare/**/*'",
+    "unit": "jest",
     "------------------------------------------------------------------------------------------------": ""
   },
   "repository": {