db/Simple: remove unused function db_get_directory()

src/command/StickerCommands.cxx

@@ -23,7 +23,6 @@
 #include "db/DatabaseLock.hxx"
 #include "db/DatabasePlugin.hxx"
 #include "db/DatabaseGlue.hxx"
-#include "db/DatabaseSimple.hxx"
 #include "sticker/SongSticker.hxx"
 #include "sticker/StickerPrint.hxx"
 #include "sticker/StickerDatabase.hxx"

src/db/DatabaseGlue.cxx

@@ -104,19 +104,6 @@ db_get_root(void)
 	return ((SimpleDatabase *)db)->GetRoot();
 }
 
-Directory *
-db_get_directory(const char *name)
-{
-	if (db == nullptr)
-		return nullptr;
-
-	Directory *music_root = db_get_root();
-	if (name == nullptr)
-		return music_root;
-
-	return music_root->LookupDirectory(name);
-}
-
 bool
 db_save(Error &error)
 {

src/db/DatabaseSimple.hxx

@@ -49,14 +49,6 @@ Directory *
 db_get_root(void);
 
 /**
- * Caller must lock the #db_mutex.
- */
-gcc_nonnull(1)
-gcc_pure
-Directory *
-db_get_directory(const char *name);
-
-/**
  * May only be used if db_is_simple() returns true.
  */
 bool