remove mocha obsolete dependency

Author: nleush

package.json

@@ -53,7 +53,6 @@
     "devDependencies": {
         "chai": "^4.3.7",
         "feedparser": "2.2.10",
-        "mocha": "^10.2.0",
         "mock-http-server": "^1.4.5",
         "mongoose": "^8.19.2",
         "supertest": "^7.1.4"