Revert "Tools: Add postinstall scripts"

This reverts commit 7788b95.

Author: tonyganch

package.json

@@ -26,7 +26,6 @@
   "license": "MIT",
   "repository": "https://github.com/csscomb/core",
   "scripts": {
-    "postinstall": "./scripts/postinstall.sh",
     "build": "./scripts/build.sh",
     "coverage": "./scripts/build.sh && ./scripts/coverage.sh",
     "test": "./scripts/build.sh && ./scripts/test.sh"