[#1598] golangci: Enable unparam linter

To drop unnecessary parameters and return values.

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

pkg/local_object_storage/writecache/cache.go

@@ -94,7 +94,8 @@ func (c *cache) Open(_ context.Context, mod mode.Mode) error {
 	if err != nil {
 		return metaerr.Wrap(err)
 	}
-	return metaerr.Wrap(c.initCounters())
+	c.initCounters()
+	return nil
 }
 
 // Init runs necessary services.