drm/mm: Remove unused drm_mm_replace_node

Last caller was removed with commit 078a5b49 ("drm/tests:
Remove slow tests").

Cc: Maxime Ripard <mripard@kernel.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240604175438.48125-1-rodrigo.vivi@intel.comSigned-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/drm_mm.c

@@ -648,41 +648,6 @@ void drm_mm_remove_node(struct drm_mm_node *node)
 }
 EXPORT_SYMBOL(drm_mm_remove_node);
 
-/**
- * drm_mm_replace_node - move an allocation from @old to @new
- * @old: drm_mm_node to remove from the allocator
- * @new: drm_mm_node which should inherit @old's allocation
- *
- * This is useful for when drivers embed the drm_mm_node structure and hence
- * can't move allocations by reassigning pointers. It's a combination of remove
- * and insert with the guarantee that the allocation start will match.
- */
-void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new)
-{
-	struct drm_mm *mm = old->mm;
-
-	DRM_MM_BUG_ON(!drm_mm_node_allocated(old));
-
-	*new = *old;
-
-	__set_bit(DRM_MM_NODE_ALLOCATED_BIT, &new->flags);
-	list_replace(&old->node_list, &new->node_list);
-	rb_replace_node_cached(&old->rb, &new->rb, &mm->interval_tree);
-
-	if (drm_mm_hole_follows(old)) {
-		list_replace(&old->hole_stack, &new->hole_stack);
-		rb_replace_node_cached(&old->rb_hole_size,
-				       &new->rb_hole_size,
-				       &mm->holes_size);
-		rb_replace_node(&old->rb_hole_addr,
-				&new->rb_hole_addr,
-				&mm->holes_addr);
-	}
-
-	clear_bit_unlock(DRM_MM_NODE_ALLOCATED_BIT, &old->flags);
-}
-EXPORT_SYMBOL(drm_mm_replace_node);
-
 /**
  * DOC: lru scan roster
  *

include/drm/drm_mm.h

@@ -463,7 +463,6 @@ static inline int drm_mm_insert_node(struct drm_mm *mm,
 }
 
 void drm_mm_remove_node(struct drm_mm_node *node);
-void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);
 void drm_mm_init(struct drm_mm *mm, u64 start, u64 size);
 void drm_mm_takedown(struct drm_mm *mm);