drm: remove unused function 'drm_property_unreference_blob_locked'

This function was added recently but never used, and causes a compile warning:

drivers/gpu/drm/drm_crtc.c:4324:13: warning: 'drm_property_unreference_blob_locked' defined but not used [-Wunused-function]

Removing that function avoids the warning. It can simply be put back in case it is needed in the future.

Signed-off-by Arnd Bergmann <[email protected]>

Fixes 6bcacf51d05 ("drm: Add reference counting to blob properties")

---
The broken patch is currently in
git://anongit.freedesktop.org/drm-intel#topic/drm-misc

drivers/gpu/drm/drm_crtc.c +0 -19

index 4059f065c854..6e60f71bbf46 100644
@@ -4313,25 +4313,6 @@ void drm_property_unreference_blob(struct drm_property_blob *blob)
 EXPORT_SYMBOL(drm_property_unreference_blob);
 
 /**
- * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held
- *
- * Drop a reference on a blob property. May free the object. This must be
- * called with blob_lock held.
- *
- * @param dev  Device the blob was created on
- * @param blob Pointer to blob property
- */
-static void drm_property_unreference_blob_locked(struct drm_property_blob *blob)
-{
-	if (!blob)
-		return;
-
-	DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
-
-	kref_put(&blob->refcount, drm_property_free_blob);
-}
-
-/**
  * drm_property_reference_blob - Take a reference on an existing property
  *
  * Take a new reference on an existing blob property.

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