SDL2 quirks can probably be removed now

[smcv]

While investigating #1361 I noticed that a bunch of games are prevented from loading:

*(/*|/.*)/steam-runtime+(/*)/libSDL2-2.0.so.0.9.0

Is that intended to prevent loading of an old, known-bad SDL2 version from ~/.local/share/Steam/ubuntu12_32/steam-runtime, as opposed to a version that is bundled with the game?

If yes, then those quirks can be removed. The oldest shipping Steam client has the much newer SDL 2.30.4 (libSDL2-2.0.so.0.3000.4) in its steam-runtime.

If I'm reading correctly, this would allow all quirks for

• Alien Isolation
• Company of Heroes 2
• F1 2015
• Ion Fury (internally still called Ion Maiden)
• Shadow of Mordor
• Total Warhammer
• Wesnoth

to be removed.