Fix T104390: Regression: Object selection in viewport is not working

Caused by alignment difference between C and C++. Asan caught the issue
on startup.

Removing the unused view matrix storage copy avoids this problem.

source/blender/draw/intern/draw_manager.h

@@ -637,9 +637,6 @@ typedef struct DRWManager {
   DRWView *view_active;
   DRWView *view_previous;
   uint primary_view_num;
-  /** TODO(@fclem): Remove this. Only here to support
-   * shaders without common_view_lib.glsl */
-  ViewMatrices view_storage_cpy;
 
 #ifdef USE_GPU_SELECT
   uint select_id;

source/blender/draw/intern/draw_manager_exec.c

@@ -1161,9 +1161,6 @@ static void drw_update_view(void)
   GPU_uniformbuf_update(G_draw.view_ubo, &DST.view_active->storage);
   GPU_uniformbuf_update(G_draw.clipping_ubo, &DST.view_active->clip_planes);
 
-  /* TODO: get rid of this. */
-  DST.view_storage_cpy = DST.view_active->storage;
-
   draw_compute_culling(DST.view_active);
 }