Cleanup: redundant struct declarations

source/blender/blenkernel/BKE_curve.h

@@ -40,7 +40,6 @@ struct MDeformVert;
 struct Main;
 struct Nurb;
 struct Object;
-struct Path;
 struct TextBox;
 struct rctf;
 

source/blender/editors/io/io_gpencil.h

@@ -27,7 +27,6 @@
 struct ARegion;
 struct bContext;
 struct View3D;
-struct wmOperator;
 struct wmOperatorType;
 
 void WM_OT_gpencil_import_svg(struct wmOperatorType *ot);

source/blender/editors/space_spreadsheet/spreadsheet_draw.hh

@@ -19,7 +19,6 @@
 #include "BLI_vector.hh"
 
 struct uiBlock;
-struct rcti;
 struct bContext;
 struct ARegion;
 

source/blender/gpencil_modifiers/intern/lineart/MOD_lineart.h

@@ -543,7 +543,6 @@ LineartBoundingArea *MOD_lineart_get_bounding_area(LineartRenderBuffer *rb, doub
 
 struct bGPDlayer;
 struct bGPDframe;
-struct GpencilModifierData;
 
 void MOD_lineart_gpencil_generate(LineartRenderBuffer *rb,
                                   struct Depsgraph *depsgraph,

source/blender/makesdna/DNA_lineart_types.h

@@ -35,9 +35,6 @@
 #include "DNA_ID.h"
 #include "DNA_listBase.h"
 
-struct Object;
-struct Material;
-
 /* Notice that we need to have this file although no struct defines.
  * Edge flags and usage flags are used by with scene/object/gpencil modifier bits, and those values
  * needs to stay consistent throughout. */

source/blender/windowmanager/wm.h

@@ -23,7 +23,6 @@
 
 #pragma once
 
-struct ReportList;
 struct wmWindow;
 
 #include "gizmo/wm_gizmo_wmapi.h"