Remove eslint-plugin-prettier from dependabot config file

Author: bertdeblock

.github/dependabot.yml

@@ -43,9 +43,6 @@ updates:
         versions:
           - 4.0.1
           - 4.0.2
-      - dependency-name: eslint-plugin-prettier
-        versions:
-          - 3.3.1
       - dependency-name: fs-extra
         update-types: ['version-update:semver-major']
   - package-ecosystem: npm