Remove Google apt source from gitlab:assets:compile step

Stan Hurequested to merge
sh-remove-chrome-apt-dependency-ci into master

Chrome is already installed in this image, and the apt-get update is only used to install jq. We don't need to depend on the Google apt repository to be working for this step to complete.

Sample failing build: https://gitlab.com/gitlab-org/gitlab-ce/-/jobs/221943696

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