Cleanup sound manager class (#7158)

* Cleanup sound manager client

* Use some const refs
* Use auto on iterators
* Drop unused parameters
* Move sound_openal.* to client folder
* Move sound.cpp + OnDemandSoundFetcher to client/ folder + reorganize includes properly

1 files changed, 0 insertions, 1 deletions

diff --git a/src/gamedef.h b/src/gamedef.h
index 9d3b889a0..f86eb13cd 100644
--- a/src/gamedef.h
+++ b/src/gamedef.h
@@ -27,7 +27,6 @@ class IItemDefManager;
 class NodeDefManager;
 class ICraftDefManager;
 class ITextureSource;
-class ISoundManager;
 class IShaderSource;
 class MtEventManager;
 class IRollbackManager;