drm/i915: remove structs intel_vgpu_pipe_format and intel_vgpu_fb_format

Both struct intel_vgpu_pipe_format and intel_vgpu_fb_format were never
used since its addition in commit 9f31d106 (drm/i915/gvt: Add
framebuffer decoder support). Drop them.

Found by https://github.com/jirislaby/clang-struct.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240216065326.6910-3-jirislaby@kernel.org

drivers/gpu/drm/i915/gvt/fb_decoder.h

@@ -152,17 +152,6 @@ struct intel_vgpu_cursor_plane_format {
 	u32	y_hot;		/* in pixels */
 };
 
-struct intel_vgpu_pipe_format {
-	struct intel_vgpu_primary_plane_format	primary;
-	struct intel_vgpu_sprite_plane_format	sprite;
-	struct intel_vgpu_cursor_plane_format	cursor;
-	enum DDI_PORT ddi_port;  /* the DDI port that pipe is connected to */
-};
-
-struct intel_vgpu_fb_format {
-	struct intel_vgpu_pipe_format	pipes[I915_MAX_PIPES];
-};
-
 int intel_vgpu_decode_primary_plane(struct intel_vgpu *vgpu,
 	struct intel_vgpu_primary_plane_format *plane);
 int intel_vgpu_decode_cursor_plane(struct intel_vgpu *vgpu,