Clean up ScreenSharingVNC.swift - remove unused and commented code

Summary

This PR cleans up the ScreenSharingVNC.swift file by removing dead code that was left over from development.

Changes

1. Removed commented-out duplicate ScreenSharingVNC class (lines 7-28)

   • This was a duplicate of the actual class that appears later in the file
   • The commented code included an incomplete implementation of waitForURL and stop methods

2. Removed commented-out mouse event handlers (lines 385-435)

   • Three methods were completely commented out: mouseDown, mouseDragged, and mouseUp
   • These were old implementation attempts that are no longer needed

3. Removed unused scale variable

   • The variable was defined but never used when creating the window size
   • This removes a compiler warning about unused variables

Impact

• Lines removed: 82 lines of dead code
• Code readability: Improved - less clutter and confusion
• No functional changes: The actual working code remains unchanged