Remove "Accessibility Options" from help title bar

[mjbvz]

Testing #55389

Issue Type: Bug

1. Enable custom title bar
2. Click on help

Bug
Notice entry for Accessibility Options. My understanding is that this is a command for internal use and should generally not be used by users

@alexandrudima Says we can remove the entire Accessibility Options command so that it no longer shows up in the command palette either

VS Code version: Code - Insiders 1.26.0-insider (0707dd4, 2018-07-31T05:18:06.861Z)
OS version: Windows_NT x64 10.0.17686

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz (4 x 2195)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: disabled_software rasterization: unavailable_software video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled
Memory (System)	3.98GB (1.25GB free)
Process Argv	C:\Program Files\Microsoft VS Code Insiders\Code - Insiders.exe
Screen Reader	no
VM	57%

[alexdima]

👍 We can just remove it if it bothers people. We only had it in insiders and used it as a critical Electron workaround for electron/electron#7208.

[joaomoreno]

@sbatten Added bug label.