chore(NODE-7215): remove unnecessary dependabot ignore configuration (#53)

Author: baileympearson

.github/dependabot.yml

@@ -15,9 +15,6 @@ 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"
     versioning-strategy: increase