Disable apt cache updates when removing repositories from sources.list

[Normo]

Fixes the following error during apt repository removal:

TASK [hifis.toolkit.gitlab : Remove GitLab APT repository from sources.list] ***
[WARNING]: Failed to update cache after 1 due to  retry, retrying
[WARNING]: Sleeping for 2 seconds, before attempting to update the cache again
[WARNING]: Failed to update cache after 2 due to  retry, retrying
[WARNING]: Sleeping for 3 seconds, before attempting to update the cache again
[WARNING]: Failed to update cache after 3 due to  retry, retrying
[WARNING]: Sleeping for 5 seconds, before attempting to update the cache again
[WARNING]: Failed to update cache after 4 due to  retry, retrying
[WARNING]: Sleeping for 9 seconds, before attempting to update the cache again
[WARNING]: Failed to update cache after 5 due to  retry, retrying
[WARNING]: Sleeping for 13 seconds, before attempting to update the cache again
fatal: [gitlab-staging1]: FAILED! => 
    changed: false
    msg: 'Failed to update apt cache after 5 retries: '