chore: remove deprecated yarn check from pre-commit

The `yarn check` command is deprecated in Yarn 1.x and gives false
positives when there are multiple versions of the same package in the
dependency tree (e.g., ajv 6.x for eslint vs ajv 8.x for schema-utils).
Lint and test hooks remain to validate code quality.

Author: STRML

package.json

@@ -11,7 +11,6 @@
     "build-example": "webpack",
     "dev": "webpack serve --open",
     "prepublishOnly": "npm run build",
-    "validate": "yarn check",
     "preversion": "npm run lint",
     "version": "git add CHANGELOG.md",
     "postversion": "git push && git push --tags",
@@ -76,7 +75,6 @@
   },
   "pre-commit": [
     "lint",
-    "validate",
     "test"
   ]
 }