remove deprecated nolintlint option (#9)

this was deprecated in [1.48](https://github.com/golangci/golangci-lint/releases/tag/v1.48.0)
golangci/golangci-lint#3002

golangci-lint/.golangci.yml

@@ -40,7 +40,6 @@ linters-settings:
   misspell:
     locale: US
   nolintlint:
-    allow-leading-space: true # don't require machine-readable nolint directives (i.e. with no leading space)
     allow-unused: false # report any unused nolint directives
     require-explanation: false # don't require an explanation for nolint directives
     require-specific: true # require nolint directives to be specific about which linter is being skipped