fix required brew update on osx builds

Author: rubencodacy

.circleci/config.yml

@@ -167,9 +167,6 @@ jobs:
       - run:
           name: prepare the environment
           command: |
-            # Call brew update explicitly until Circle CI update their images,
-            # see https://github.com/Homebrew/brew/issues/11123
-            brew update
             brew install mockserver coreutils
             export CODACY_REPORTER_TMP_FOLDER=".codacy-coverage"
             version=$(cat .version)