[supervisor] Remove misleading error message

[aledbf]

During the workspace disposal process, we see a message error triggered by closing the context.

...
{"@type":"type.googleapis.com/google.devtools.clouderrorreporting.v1beta1.ReportedErrorEvent","error":"context canceled","level":"error","message":"cannot provide Docker activation socket","serviceContext":{"service":"supervisor","version":""},"severity":"ERROR","time":"2021-08-18T11:46:37Z"}

xref: #5240

[aledbf]

/assign @akosyakov

[codecov]

Codecov Report

Merging #5293 (3a1f0eb) into main (58f0b33) will increase coverage by 37.61%.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##           main    #5293       +/-   ##
=========================================
+ Coverage      0   37.61%   +37.61%     
=========================================
  Files         0       16       +16     
  Lines         0     4099     +4099     
=========================================
+ Hits          0     1542     +1542     
- Misses        0     2432     +2432     
- Partials      0      125      +125     

Flag	Coverage Δ
components-supervisor-app	37.61% <0.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
components/supervisor/pkg/supervisor/supervisor.go	6.41% <0.00%> (ø)
components/supervisor/pkg/ports/tunnel.go	63.63% <0.00%> (ø)
components/supervisor/pkg/ports/exposed-ports.go	0.00% <0.00%> (ø)
components/supervisor/pkg/ports/ports.go	60.03% <0.00%> (ø)
components/supervisor/pkg/terminal/terminal.go	63.27% <0.00%> (ø)
components/supervisor/pkg/ports/served-ports.go	76.00% <0.00%> (ø)
components/supervisor/pkg/supervisor/user.go	33.12% <0.00%> (ø)
components/supervisor/pkg/terminal/ring-buffer.go	45.65% <0.00%> (ø)
components/supervisor/pkg/supervisor/config.go	4.51% <0.00%> (ø)
... and 7 more

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[akosyakov]

/lgtm

[roboquat]

LGTM label has been added.

Git tree hash: fc93c7b4e3c67584cf17dd0677c1464c8e32490d

[roboquat]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: akosyakov

Associated issue: #5240

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• components/supervisor/OWNERS [akosyakov]

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