Remove metadata from docs

Problem to solve

We decided not to use the Additional page metadata any more.

See this issue for the decision: #224460 (closed)

This issue is to track the removal of these items from the docs.

Marcia

Please remove this metadata from your assigned topics: author, author_gitlab, date, article_type, level, last_updated :

gitlab-basics/start-using-git.md:last_updated: 2020-06-30
topics/git/numerous_undo_possibilities_in_git/index.md:last_updated: 2019-05-31
topics/git/how_to_install_git/index.md:last_updated: 2020-04-22
user/project/file_lock.md:last_updated: 2020-08-10

DONE

Suzanne

Last_updated (No owner):

install/postgresql_extensions.md:last_updated: 2020-09-01
topics/git/lfs/migrate_to_git_lfs.md:last_updated: 2019-07-11
update/mysql_to_postgresql.md:last_updated: 2019-06-18

Runner:

configuration/runner_autoscale_aws/index.md:author: Achilleas Pipinellis
configuration/runner_autoscale_aws/index.md:last_updated: 2019-08-21
index.md:last_updated: 2019-01-17
install/linux-repository.md:last_updated: 2020-06-09
install/linux-manually.md:last_updated: 2017-10-09
install/windows.md:last_updated: 2020-03-27
install/old.md:last_updated: 2017-10-09
install/bleeding-edge.md:last_updated: 2018-11-14
install/freebsd.md:last_updated: 2019-07-15

Marcel

Please remove this metadata from your assigned topics: author, author_gitlab, date, article_type, level, last_updated:

ci/examples/test_phoenix_app_with_gitlab_ci_cd/index.md:author: Alexandre S Hostert
ci/examples/end_to_end_testing_webdriverio/index.md:author: Vincent Tunru
ci/examples/deploy_spring_boot_to_cloud_foundry/index.md:author: Dylan Griffith
ci/examples/laravel_with_gitlab_and_envoy/index.md:author: Mehran Rasulian
ci/examples/devops_and_game_dev_with_gitlab_ci_cd/index.md:author: Ryan Hall
ci/examples/artifactory_and_gitlab/index.md:author: Fabio Busatto

Remove last_updated from:

ci/ssh_keys/README.md:last_updated: 2017-12-13

Amy

Please remove this metadata from your assigned topics: author, author_gitlab, date, article_type, level, last_updated:

user/project/pages/introduction.md:last_updated: 2020-01-06
user/project/pages/lets_encrypt_for_gitlab_pages.md:last_updated: 2019-07-15
user/project/pages/custom_domains_ssl_tls_certification/index.md:last_updated: 2020-07-25
user/project/pages/getting_started_part_one.md:last_updated: 2018-06-04
user/project/pages/getting_started/pages_from_scratch.md:last_updated: 2020-01-06

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