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

.husky/pre-push

@@ -18,8 +18,7 @@
     "start": "fedx-scripts webpack-dev-server --progress",
     "dev": "PUBLIC_PATH=/ora-grading/ MFE_CONFIG_API_URL='http://localhost:8000/api/mfe_config/v1' fedx-scripts webpack-dev-server --progress --host apps.local.openedx.io",
     "test": "TZ=GMT fedx-scripts jest --coverage --passWithNoTests",
-    "watch-tests": "jest --watch",
-    "prepare": "husky install"
+    "watch-tests": "jest --watch"
   },
   "author": "edX",
   "license": "AGPL-3.0",
@@ -85,7 +84,6 @@
     "@testing-library/react": "12.1.5",
     "axios-mock-adapter": "^1.20.0",
     "fetch-mock": "^9.11.0",
-    "husky": "^7.0.0",
     "identity-obj-proxy": "^3.0.0",
     "jest": "29.7.0",
     "jest-environment-jsdom": "^29.7.0",