Drop opcache from cli actions

[J0WI]

docker-library/wordpress#407

Before a68a25c this was in a inconsistent state.

[stale]

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[williamdes]

@J0WI this needs to be merged
Can you explain why it should be removed or not?

[J0WI]

This came up at nextcloud/documentation#1439:

Enabling OPcache for CLI has the following effect: it will optimize the CLI script (which takes of course more time the first time to do). However, in the case of a CLI script, it is always the first time for every single invocation of the script. The cache only lives until the process terminates, so as soon as the script ends the optimizations are gone.

See also https://stackoverflow.com/a/25047263

[williamdes]

Merged, thank you for the the explanation and contribution @J0WI !