Remove unnecessary lines from husky/lint-staged scripts (#557)

Author: latonv

.husky/pre-commit

@@ -1,4 +1 @@
-#!/bin/sh
-. "$(dirname "$0")/_/husky.sh"
-
 npx lint-staged

package.json

@@ -114,8 +114,7 @@
   "lint-staged": {
     "*.ts": [
       "eslint --fix",
-      "prettier --write",
-      "git add"
+      "prettier --write"
     ]
   }
 }