drm: remove old documentation comment cruft from drmP.h

Throw out the leftovers.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180327204722.31246-2-jani.nikula@intel.com

include/drm/drmP.h

@@ -95,14 +95,6 @@ struct dma_buf_attachment;
 struct pci_dev;
 struct pci_controller;
 
-/***********************************************************************/
-/** \name DRM template customization defaults */
-/*@{*/
-
-/***********************************************************************/
-/** \name Internal types and structures */
-/*@{*/
-
 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
 
 /**
@@ -128,19 +120,6 @@ static inline int drm_core_check_feature(struct drm_device *dev, int feature)
 	return ((dev->driver->driver_features & feature) ? 1 : 0);
 }
 
-/******************************************************************/
-/** \name Internal function definitions */
-/*@{*/
-
-				/* Driver support (drm_drv.h) */
-
-/*
- * These are exported to drivers so that they can implement fencing using
- * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
- */
-
-/*@}*/
-
 /* returns true if currently okay to sleep */
 static inline bool drm_can_sleep(void)
 {