Remove `pygame` provider (`window`, `audio`, `clipboard`, `image`, `text`, `input`)

[misl6]

The pygame provider has been deprecated 5 years ago and slated for removal in 1.11.0, but that never really happened.

From the recent survey, no one showed interest in the pygame provider, which is likely broken and outdated.

In 3.0.0 support should be completely removed.

pygame ATM is present as a provider for:

• window
• audio
• clipboard
• image
• text
• input (joystick)