UI: Remove "Show Frame Indicator" option

This option was doing nothing in Blender 2.80.
I don't really see a reason for keeping it around.

Reviewers: campbellbarton

Differential Revision: https://developer.blender.org/D5552

release/scripts/startup/bl_ui/space_sequencer.py

@@ -265,7 +265,6 @@ class SEQUENCER_MT_view(Menu):
             layout.separator()
             layout.operator_context = 'INVOKE_DEFAULT'
 
-#           layout.prop(st, "show_frame_indicator") #Do not have any function and do not work.
             layout.prop(st, "show_strip_offset")
             layout.prop(st, "show_marker_lines")