Removed Obsolete features from Mouse Provider, fixes issue

[ElliotGarbus]

This PR removes obsolete features from the mouse provider. This fixes issue #5898 The mouse provider had features that were used to interact with a scatter. These features were made obsolete by the multitouch_sim.

The removed features:

• Pressing Shift + click would issue a double-tap
• Pressing Alt during a drag would create a new touch
• Holding Alt while pressing a mouse button would cancel drag

Maintainer merge checklist

• Title is descriptive/clear for inclusion in release notes.
• Applied a Component: xxx label.
• Applied the api-deprecation or api-break label.
• Applied the release-highlight label to be highlighted in release notes.
• Added to the milestone version it was merged into.
• Unittests are included in PR.
• Properly documented, including versionadded, versionchanged as needed.