Suggesting this as idea to consider for MWI team.

So this is asking to remove the code in ApiEntryPoint that ends up calling this:

             LegacyLogger::emit(
				implode(
					',',
					$items
				) . "\n",
				$apiRequestLog
			);

We have a mechanism now that will warn people when running the updater if they have outdated config variables. We can use that.

Change #1049234 had a related patch set uploaded (by Aaron Schulz; author: Aaron Schulz):

[mediawiki/core@master] api: deprecate and deactivate $wgAPIRequestLog

https://gerrit.wikimedia.org/r/1049234