[gitpod-protocol] Remove deprecated and unused errors and cleanup logs

[aledbf]

https://pkg.go.dev/encoding/json#UnmarshalFieldError
https://pkg.go.dev/encoding/json#InvalidUTF8Error
https://pkg.go.dev/encoding/json#UnmarshalFieldError

Internal link https://cloudlogging.app.goo.gl/fx5Df54fG4dpcCHm9

[aledbf]

/assign @csweichel

[codecov]

Codecov Report

Merging #5173 (af4e82b) into main (92deb3d) will increase coverage by 31.36%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           main    #5173       +/-   ##
=========================================
+ Coverage      0   31.36%   +31.36%     
=========================================
  Files         0       35       +35     
  Lines         0     5819     +5819     
=========================================
+ Hits          0     1825     +1825     
- Misses        0     3846     +3846     
- Partials      0      148      +148     

Flag	Coverage Δ
components-ee-agent-smith-app	26.12% <ø> (?)
components-gitpod-cli-app	9.74% <ø> (?)
components-gitpod-protocol-go-lib	∅ <ø> (?)
components-local-app-app-darwin	∅ <ø> (?)
components-local-app-app-linux	∅ <ø> (?)
components-local-app-app-windows	∅ <ø> (?)
components-supervisor-app	37.41% <ø> (?)

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

Impacted Files	Coverage Δ
components/supervisor/pkg/terminal/terminal.go	63.27% <0.00%> (ø)
components/gitpod-cli/cmd/root.go	0.00% <0.00%> (ø)
components/gitpod-cli/cmd/completion.go	40.00% <0.00%> (ø)
components/supervisor/pkg/dropwriter/dropwriter.go	73.46% <0.00%> (ø)
components/ee/agent-smith/pkg/agent/agent.go	19.04% <0.00%> (ø)
components/supervisor/pkg/supervisor/services.go	25.50% <0.00%> (ø)
components/supervisor/pkg/terminal/service.go	29.09% <0.00%> (ø)
components/gitpod-cli/cmd/preview.go	32.14% <0.00%> (ø)
components/supervisor/pkg/supervisor/git.go	0.00% <0.00%> (ø)
components/supervisor/pkg/supervisor/tasks.go	55.22% <0.00%> (ø)
... and 25 more

---

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[csweichel]

/approve no-issue

[csweichel]

/lgtm

[roboquat]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: csweichel

Associated issue requirement bypassed by: csweichel

The full list of commands accepted by this bot can be found here.

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• components/gitpod-protocol/OWNERS [csweichel]

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[roboquat]

LGTM label has been added.

Git tree hash: 354572d07848ec29f0a604bf200ae0f97105671d