sites must specify an age limit for them

[remitamine]

even if i set the age-limit to 0 they appear in the list of the extractors (and may be there are others in the list that i didn't notice)

youtube-dl -v --list-extractors 
[debug] System config: []
[debug] User config: ['--external-downloader', 'aria2c', '--external-downloader-args', '-x 16 --check-certificate=false', '-f', '[height<=?720]', '--sub-lang', 'ar,en', '--write-sub', '--age-limit', '0']
[debug] Command-line args: ['-v', '--list-extractors']
...
91porn
...
SexyKarma
...

[dstftw]

This is due to invalid tests with missing age_limit.

[dstftw]

Will be fixed in the next version.