sticker/Database: remove unused function sticker_get_value()

src/sticker/StickerDatabase.cxx

@@ -314,16 +314,6 @@ sticker_delete_value(const char *type, const char *uri, const char *name)
 	return modified;
 }
 
-const char *
-sticker_get_value(const Sticker &sticker, const char *name) noexcept
-{
-	auto i = sticker.table.find(name);
-	if (i == sticker.table.end())
-		return nullptr;
-
-	return i->second.c_str();
-}
-
 void
 sticker_foreach(const Sticker &sticker,
 		void (*func)(const char *name, const char *value,

src/sticker/StickerDatabase.hxx

@@ -109,17 +109,6 @@ bool
 sticker_delete_value(const char *type, const char *uri, const char *name);
 
 /**
- * Determines a single value in a sticker.
- *
- * @param sticker the sticker object
- * @param name the name of the sticker
- * @return the sticker value, or nullptr if none was found
- */
-gcc_pure
-const char *
-sticker_get_value(const Sticker &sticker, const char *name) noexcept;
-
-/**
  * Iterates over all sticker items in a sticker.
  *
  * @param sticker the sticker object