Cleanup: redundant struct declarations

source/blender/editors/include/ED_util.h

@@ -31,7 +31,6 @@ extern "C" {
 
 struct Main;
 struct bContext;
-struct wmOperatorType;
 
 /* ed_util.c */
 void ED_editors_init_for_undo(struct Main *bmain);

source/blender/sequencer/SEQ_render.h

@@ -27,12 +27,10 @@
 extern "C" {
 #endif
 
-struct Editing;
 struct ListBase;
 struct Main;
 struct Scene;
 struct Sequence;
-struct bSound;
 
 typedef enum eSeqTaskId {
   SEQ_TASK_MAIN_RENDER,

source/blender/sequencer/SEQ_sequencer.h

@@ -29,27 +29,10 @@ extern "C" {
 
 #include "DNA_scene_types.h"
 
-struct BlendDataReader;
-struct BlendLibReader;
-struct BlendWriter;
-struct Depsgraph;
 struct Editing;
-struct GPUOffScreen;
-struct GSet;
-struct ImBuf;
-struct Main;
-struct Mask;
-struct ReportList;
 struct Scene;
-struct SeqIndexBuildContext;
 struct Sequence;
-struct SequenceModifierData;
 struct SequencerToolSettings;
-struct Stereo3dFormat;
-struct StripElem;
-struct TextVars;
-struct bContext;
-struct bSound;
 
 /* RNA enums, just to be more readable */
 enum {

source/blender/sequencer/SEQ_sound.h

@@ -27,8 +27,6 @@
 extern "C" {
 #endif
 
-struct Editing;
-struct ListBase;
 struct Main;
 struct Scene;
 struct Sequence;