chore(NODE-7215): remove unnecessary dependabot ignore configuration

Author: baileympearson

.github/dependabot.yml

@@ -20,18 +20,9 @@ updates:
       # sinon-chai 4.x+ supports chai 5.x+.
       - dependency-name: "sinon-chai"
         versions: [">=4.0.0"]
-      # nyc is Node18+ only starting on [email protected].
-      - dependency-name: "nyc"
-        versions: [">=16.0.0"]
       # we ignore TS as a part of quarterly dependency updates.
       - dependency-name: "typescript"
 
-      # drops support for node 16
-      - dependency-name: "node-gyp"
-        versions: [">=11.0.0"]
-      - dependency-name: "mocha"
-        versions: [">=11.0.0"]
-
     groups:
       prod-dependencies:
         dependency-type: "production"