removed redundant code in source

internal/data/source.go

@@ -12,20 +12,6 @@ type SourceType struct {
 	RegexSong   *regexp.Regexp
 }
 
-var SourceTypes = []SourceType{
-	{Name: "Youtube", Regex: regexp.MustCompile(`(?i)\b(?:https?:\/\/)?(?:www\.)?(?:youtube\.com\/(?:[^\/\n\s]+\/\S+\/|(?:v|e(?:mbed)?)\/|\S*?[?&]v=)|youtu\.be\/)([a-zA-Z0-9_-]{11})\b`)},
-	{Name: "Musify", Regex: regexp.MustCompile(`(?i)https?://musify\.club/(artist|track|release)/[a-z\-0-9]+`)},
-}
-
-func GetSourceType(name string) *SourceType {
-	for i, st := range SourceTypes {
-		if st.Name == name {
-			return &SourceTypes[i]
-		}
-	}
-	panic("couldn't find source type for " + name)
-}
-
 type ObjectType string
 
 const SongSource = ObjectType("song")