Uninstalling Chrome debugger extension leaves commands in command palette

[stevencl]

Issue Type: Bug

Found while testing #67298

Install Debugger for Chrome extension
Don't activate the extension
Uninstall the extension
See that the extension has been uninstalled since the install button is now active in the extension viewlet
View command palette - note that chrome extension commands are still visible:

VS Code version: Code - Insiders 1.31.0-insider (acc7365, 2019-01-29T06:20:23.551Z)
OS version: Windows_NT x64 10.0.17763

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz (8 x 2112)
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: enabled surface_synchronization: enabled_on video_decode: enabled webgl: enabled webgl2: enabled
Memory (System)	15.93GB (3.88GB free)
Process Argv
Screen Reader	no
VM	0%

Extensions (5)

Extension	Author (truncated)	Version
tslint	eg2	1.0.27
python	ms-	2018.8.0
azure-account	ms-	0.8.0
debugger-for-chrome	msj	4.11.1
test-search-rg	rob	0.0.3

[dbaeumer]

@alexandrudima could this be a side effect of the dynamic extension work

[alexdima]

Let's track in #67504 which reached @jrieken sooner.