remove old handler

[turkosaurus]

out with the old custom implementation in favor of something already full featured (attrs, etc.)

recent improvements make this obsolete/undesireable

[Copilot]

Pull Request Overview

This PR removes the deprecated custom logging handler and its associated tests in favor of the new full-featured implementation.

• Removed obsolete tests from handler_test.go
• Removed the old custom SlogHandler implementation and its initialization in handler.go

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
handler_test.go	Removed tests for the old custom handler
handler.go	Removed the old custom logging handler implementation and methods

Comments suppressed due to low confidence (2)

handler_test.go:1

• The removal of tests for the old custom handler may leave a gap in verifying the new logging implementation. Please ensure that the new implementation is well covered by tests elsewhere.

package log

handler.go:1

• The removal of the SlogHandler implementation requires confirming that all references to this handler and its initialization via Init are updated to use the new implementation. Double-check that no dependent code still relies on the removed functionality.

package log