Remove NSMenuExtra header (Synergy, d6cee75)Created 12/21/2007, updated 3/5/2024snippetsIt's unused, so get rid of the clutter. Signed-off-by: Greg Hurrell <greg@hurrell.net> ← Convert all nibs to xibs (Synergy, c797be5)Update release procedure and development notes (Synergy, 10bd7f6) →All snippets