Remove noisy "got diagnostics" trace log (#4101)

* Initial plan

* Remove noisy "got diagnostics" trace log

Removes the excessive `[Diagnostics] got diagnostics` trace-level log
that fires on every diagnostic change for every URI, flooding trace logs.

Co-authored-by: benibenj <44439583+benibenj@users.noreply.github.com>

* Remove unused ILogService import and constructor parameter

Co-authored-by: benibenj <44439583+benibenj@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: benibenj <44439583+benibenj@users.noreply.github.com>