chore: remove husky 🪓🐶

We remove husky, which is triggering pre-push git hooks, including
running "npm lint". This is causing failures when building Docker
images, because "npm clean-install --omit=dev" automatically triggers "npm
prepare", which attemps to run "husky". But husky is not listed in the
build dependencies, only in devDependencies. As a consequence, package
installation is failing with the following error:

        14.13 > @edx/frontend-app-ora-grading@0.0.1 prepare
        14.13 > husky install
        14.13
        14.15 sh: 1: husky: not found

Similar to: openedx/frontend-app-learning#1622

Author: regisb

package-lock.json

@@ -19,11 +19,6 @@
     "dev": "PUBLIC_PATH=/discussions/ MFE_CONFIG_API_URL='http://localhost:8000/api/mfe_config/v1' fedx-scripts webpack-dev-server --progress --host apps.local.openedx.io",
     "test": "fedx-scripts jest --coverage --passWithNoTests"
   },
-  "husky": {
-    "hooks": {
-      "pre-commit": "npm run lint"
-    }
-  },
   "author": "edX",
   "license": "AGPL-3.0",
   "homepage": "https://github.com/openedx/frontend-app-discussions#readme",
@@ -75,7 +70,6 @@
     "babel-plugin-react-intl": "8.2.25",
     "eslint-plugin-simple-import-sort": "7.0.0",
     "glob": "7.2.0",
-    "husky": "7.0.4",
     "jest": "29.7.0",
     "rosie": "2.1.1"
   }