chore: remove outdated dependency ignores

Author: dhensby

.github/dependabot.yml

@@ -5,16 +5,6 @@ updates:
     schedule:
       interval: daily
     open-pull-requests-limit: 10
-    ignore:
-      - dependency-name: sinon
-        versions:
-          - 10.0.0
-          - 9.2.4
-      - dependency-name: mocha
-        versions:
-          - 8.2.1
-          - 8.3.0
-          - 8.3.1
   - package-ecosystem: github-actions
     directory: "/"
     schedule: