Remove unnecessary debug log (#21536)

It distractingly shows up on unit tests

* Looks like a leftover from #20571

Signed-off-by: Yarden Shoham <hrsi88@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

modules/markup/markdown/meta.go

@@ -10,8 +10,6 @@ import (
 	"unicode"
 	"unicode/utf8"
 
-	"code.gitea.io/gitea/modules/log"
-
 	"gopkg.in/yaml.v3"
 )
 
@@ -99,8 +97,6 @@ func ExtractMetadataBytes(contents []byte, out interface{}) ([]byte, error) {
 		return contents, errors.New("could not determine metadata")
 	}
 
-	log.Info("%s", string(front))
-
 	if err := yaml.Unmarshal(front, out); err != nil {
 		return contents, err
 	}