accel/ivpu: Remove unneeded drm_driver declaration

Cleanup drm_driver declaration leftover.
Reviewed-by: Krystian Pradzynski <krystian.pradzynski@linux.intel.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231028133415.1169975-3-stanislaw.gruszka@linux.intel.com

drivers/accel/ivpu/ivpu_drv.c

@@ -31,8 +31,6 @@
 			   __stringify(DRM_IVPU_DRIVER_MINOR) "."
 #endif
 
-static const struct drm_driver driver;
-
 static struct lock_class_key submitted_jobs_xa_lock_class_key;
 
 int ivpu_dbg_mask;