Legacy cleanup, part 2 (#3659)

* Legacy cleanup, part 2

There are still things that can be removed, those will be likely done in part three:
`The Return of the Cleanup` :)

Signed-off-by: nemerle <96597+nemerle@users.noreply.github.com>

* Fix windows build

Somehow there were some unfixed errors from enabled warnings?
I'm unsure if I've pulled repo in unstable state, or those were somehow
missed.

Signed-off-by: nemerle <96597+nemerle@users.noreply.github.com>

Gems/Maestro/Code/Source/Cinematics/AnimPostFXNode.cpp

@@ -12,7 +12,6 @@
 #include "AnimSplineTrack.h"
 #include "CompoundSplineTrack.h"
 #include "BoolTrack.h"
-#include "IPostEffectGroup.h"
 #include "Maestro/Types/AnimNodeType.h"
 #include "Maestro/Types/AnimParamType.h"
 #include "Maestro/Types/AnimValueType.h"
@@ -236,7 +235,7 @@ CAnimNode* CAnimPostFXNode::CreateNode(const int id, AnimNodeType nodeType)
         retNode = aznew CAnimPostFXNode(id, nodeType, pDesc);
         static_cast<CAnimPostFXNode*>(retNode)->m_nodeType = nodeType;
     }
-    
+
     return retNode;
 }