golangci-lint: Remove unused megacheck lint
The megacheck lint is deprecated as of golangci-lint v1.59.0 and has been split into gosimple, staticcheck, and unused lints. We already have all of the above enabled, so remove megacheck.
The megacheck lint is deprecated as of golangci-lint v1.59.0 and has been split into gosimple, staticcheck, and unused lints. We already have all of the above enabled, so remove megacheck.