Fix golangci-lint config verify fails

```
jsonschema: "linters-settings.testifylint" does not validate with "/properties/linters-settings/properties/testifylint/type": expected object, but got null
jsonschema: "linters-settings.gofmt" does not validate with "/properties/linters-settings/properties/gofmt/type": expected object, but got null
jsonschema: "linters-settings.wrapcheck" does not validate with "/properties/linters-settings/properties/wrapcheck/type": expected object, but got null
Failed executing command with error: the configuration contains invalid elements
, Error: Command failed: /home/runner/golangci-lint-1.60.3-linux-amd64/golangci-lint config verify
jsonschema: "linters-settings.testifylint" does not validate with "/properties/linters-settings/properties/testifylint/type": expected object, but got null
jsonschema: "linters-settings.gofmt" does not validate with "/properties/linters-settings/properties/gofmt/type": expected object, but got null
jsonschema: "linters-settings.wrapcheck" does not validate with "/properties/linters-settings/properties/wrapcheck/type": expected object, but got null
Failed executing command with error: the configuration contains invalid elements
```

https://github.com/ruby-go-gem/go-gem-wrapper/actions/runs/13358375299/job/37304299023?pr=274

Author: sue445

.golangci.yml

@@ -1,12 +1,9 @@
 linters-settings:
-  gofmt:
   revive:
     rules:
       - name: exported
         arguments:
           - disableStutteringCheck
-  testifylint:
-  wrapcheck:
 
 linters:
   enable: