drm/i915: Remove lost comment from i915_gem_context

The comment is very old and quite misleading now.

drivers/gpu/drm/i915/i915_gem_context.c:349: warning: No description found for parameter 'dev_priv'
drivers/gpu/drm/i915/i915_gem_context.c:349: warning: No description found for parameter 'file_priv'
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180208111559.32663-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/i915_gem_context.c

@@ -338,11 +338,6 @@ static void __destroy_hw_context(struct i915_gem_context *ctx,
 	context_close(ctx);
 }
 
-/**
- * The default context needs to exist per ring that uses contexts. It stores the
- * context state of the GPU for applications that don't utilize HW contexts, as
- * well as an idle case.
- */
 static struct i915_gem_context *
 i915_gem_create_context(struct drm_i915_private *dev_priv,
 			struct drm_i915_file_private *file_priv)