x/tools/gopls: clean up "semantictokens are disabled" error message

[dfdumaresq]

Type: Bug

Open VSCode Insiders
Open any .go file
Allow installation of the Go Extension
Under Help/Choose Toggle Developers Tools
Notice the Error:

 ERR semantictokens are disabled: Error: semantictokens are disabled
	at handleResponse (/Users/my-home/.vscode-insiders/extensions/golang.go-0.40.3/dist/goMain.js:8606:40)
	at handleMessage (/Users/my-home/.vscode-insiders/extensions/golang.go-0.40.3/dist/goMain.js:8416:11)
	at processMessageQueue (/Users/my-home/.vscode-insiders/extensions/golang.go-0.40.3/dist/goMain.js:8431:13)
	at Immediate.<anonymous> (/Users/my-home/.vscode-insiders/extensions/golang.go-0.40.3/dist/goMain.js:8407:11)
	at process.processImmediate (node:internal/timers:476:21)

Extension version: 0.40.3
VS Code version: Code - Insiders 1.86.0-insider (Universal) (05047486b6df5eb8d44b2ecd70ea3bdf775fd937, 2024-01-31T03:31:41.454Z)
OS version: Darwin x64 23.2.0
Modes:

System Info

Item	Value
CPUs	Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz (16 x 2300)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled
Load (avg)	2, 3, 3
Memory (System)	16.00GB (0.18GB free)
Process Argv	--crash-reporter-id 6acf4a8e-574a-4adc-a517-13b2eeb4f349
Screen Reader	no
VM	0%

A/B Experiments

vsliv368cf:30146710
vspor879:30202332
vspor708:30202333
vspor363:30204092
vscod805:30301674
vsaa593:30376534
py29gd2263:30784851
c4g48928:30535728
2i9eh265:30646982
962ge761:30841072
pythongtdpath:30726887
welcomedialogc:30812479
pythonidxpt:30768918
pythonnoceb:30776497
asynctok:30898717
dsvsc013:30777762
dsvsc014:30777825
dsvsc015:30821418
pythontestfixt:30866404
pythonregdiag2:30926734
pyreplss1:30879911
pythonmypyd1:30859725
pythoncet0:30859736
pythontbext0:30879054
accentitlementst:30870582
dsvsc016:30879898
dsvsc017:30880771
dsvsc018:30880772
d34g3935:30953408
edj9j583:30943796
fegfb526:30952798
7j2b6412:30951517
bg6jg535:30946824
ccp2r6:30950907

[adonovan]

Thanks for the report. This error is benign and you can safely ignore it, but we will try to make the log tidier.

[findleyr]

This was done in #66746