ci: macOS runners - set CCACHE back to 50GB to help VMs

Author: petermESP

.gitlab/ci/build.yml

@@ -237,7 +237,6 @@ pytest_build_system_macos:
     PYENV_VERSION: "3.9"
     # CCACHE_DIR: "/cache/idf_ccache". On macOS, you cannot write to this folder due to insufficient permissions.
     CCACHE_DIR: "" # ccache will use "$HOME/Library/Caches/ccache".
-    CCACHE_MAXSIZE: "5G" # To preserve the limited Macbook storage. CCACHE automatically prunes old caches to fit the set limit.
     # Workaround for a bug in Parallels executor where CI_PROJECT_DIR is not an absolute path,
     # but a relative path to the build directory (builds/espressif/esp-idf instead of ~/builds/espressif/esp-idf.
     # GitLab sets the project dir to this template `<builds_dir>/<namespace>/<project_name>`