remove post-install script

Author: kapravel

package.json

@@ -8,7 +8,6 @@
   },
   "scripts": {
     "build": "tsc && chmod 755 ./build/index.js && (chmod 755 ./build/mock-client/*.js 2>/dev/null || true)",
-    "postinstall": "npm run build",
     "debug:stdio": "node ./build/mock-client/debug-client.js",
     "debug:sdk": "node ./build/mock-client/stdio-client.js",
     "debug:http": "node ./build/mock-client/http-client.js",