db/simple/Song: remove StringView constructor

src/db/plugins/simple/Song.cxx

@@ -23,13 +23,6 @@
 #include "song/DetachedSong.hxx"
 #include "song/LightSong.hxx"
 #include "fs/Traits.hxx"
-#include "util/StringView.hxx"
-
-inline
-Song::Song(StringView _uri, Directory &_parent) noexcept
-	:parent(_parent), uri(_uri.data, _uri.size)
-{
-}
 
 Song::Song(DetachedSong &&other, Directory &_parent) noexcept
 	:tag(std::move(other.WritableTag())),

src/db/plugins/simple/Song.hxx

@@ -97,8 +97,6 @@ struct Song {
 	Song(U &&_uri, Directory &_parent) noexcept
 		:parent(_parent), uri(std::forward<U>(_uri)) {}
 
-	Song(StringView _uri, Directory &parent) noexcept;
-
 	Song(DetachedSong &&other, Directory &_parent) noexcept;
 
 	/**