Remove mouse input from mania touch controls

[smoogipoo]

Resolves #29378

I agree this is unnecessary.

[peppy]

I'm fine with giving this a try. The edge case would be a user with touch input that's being mapped to a mouse in windows (used to be a more common thing, but probably much less so these days as vendors want to make use of proper touch input that windows offers).

[bdach]

I don't normally advocate for toggles but we already have a toggle that this could be pulled under?

osu/osu.Game/Overlays/Settings/Sections/Input/MouseSettings.cs

Lines 78 to 82 in a71bc3a

	new SettingsCheckbox
	{
	LabelText = MouseSettingsStrings.DisableClicksDuringGameplay,
	Current = osuConfig.GetBindable<bool>(OsuSetting.MouseDisableButtons)
	},

[smoogipoo]

Actually, that setting already works to disable this overlay. I'd be alright with that direction, depending on what @peppy says.

[peppy]

Honestly I say we just nuke it for now and see if a single person complains. Returning under that setting is a fine compromise if there's valid reason to leave it.