Allow providing custom sprite text for RollingCounter<T>
This was pretty pointless anyway and from its usages, doesn't look to need to exist.
# Conflicts: # osu.Game.Rulesets.Catch.Tests/TestSceneBananaShower.cs # osu.Game.Rulesets.Catch.Tests/TestSceneHyperDash.cs # osu.Game/Tests/Visual/ModTestScene.cs # osu.Game/Tests/Visual/OsuTestScene.cs