Remove ununsed dev-dependency

Author: wooorm

package.json

@@ -119,7 +119,6 @@
     "remark-gfm": "^3.0.0",
     "remark-preset-wooorm": "^9.0.0",
     "remark-toc": "^8.0.0",
-    "rimraf": "^3.0.0",
     "type-coverage": "^2.0.0",
     "typescript": "^4.0.0",
     "xo": "^0.53.0"