Description

Qt5X11Extras (QX11Info) was added in 762983b, but it doesn't seem to actually be used. Qt6 doesn't yet ship X11Extras, so let's remove it.

#3177 added Qt5X11Extras as a dependency, though doesn't actually seem to use classes or functions from it. This was to work around obsproject/obs-browser#219, but that appears to have been resolved by updating to CEF 4280+. Native dialogs were reinstated in 58497e5 (#4155), but we still have Qt5X11Extras as a dependency. Since X11Extras is not currently part of Qt6, and it has no expected ship date, and we aren't using it, let's remove it.

Pinging @cg2121 and @GeorgesStavracas since they authored the PRs linked above.

https://doc.qt.io/qt-5/qtx11extras-module.html
https://doc.qt.io/qt-5/qx11info.html

Motivation and Context

Less dependencies. Makes a future transition to Qt6 easier.

How Has This Been Tested?

Compiles on a Ubuntu 20.04 VM against Qt 5.12.8. Would appreciate more testing or review from people who use Linux regularly.

Types of changes

• Code cleanup (non-breaking change which makes code smaller or more readable)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.