Remove unused guest_package_events.yml

lib/gitlab/usage_data_counters/guest_package_events.yml

----
-- i_package_composer_guest_delete
-- i_package_composer_guest_pull
-- i_package_composer_guest_push
-- i_package_conan_guest_delete
-- i_package_conan_guest_pull
-- i_package_conan_guest_push
-- i_package_container_guest_delete
-- i_package_container_guest_pull
-- i_package_container_guest_push
-- i_package_debian_guest_delete
-- i_package_debian_guest_pull
-- i_package_debian_guest_push
-- i_package_generic_guest_delete
-- i_package_generic_guest_pull
-- i_package_generic_guest_push
-- i_package_golang_guest_delete
-- i_package_golang_guest_pull
-- i_package_golang_guest_push
-- i_package_maven_guest_delete
-- i_package_maven_guest_pull
-- i_package_maven_guest_push
-- i_package_npm_guest_delete
-- i_package_npm_guest_pull
-- i_package_npm_guest_push
-- i_package_nuget_guest_delete
-- i_package_nuget_guest_pull
-- i_package_nuget_guest_push
-- i_package_pypi_guest_delete
-- i_package_pypi_guest_pull
-- i_package_pypi_guest_push
-- i_package_tag_guest_delete
-- i_package_tag_guest_pull
-- i_package_tag_guest_push