drm/bridge: remove drm_for_each_bridge_in_chain()

All users have been replaced by drm_for_each_bridge_in_chain_scoped().

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20250808-drm-bridge-alloc-getput-for_each_bridge-v2-7-edb6ee81edf1@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

.clang-format

@@ -167,7 +167,6 @@ ForEachMacros:
   - 'drm_connector_for_each_possible_encoder'
   - 'drm_exec_for_each_locked_object'
   - 'drm_exec_for_each_locked_object_reverse'
-  - 'drm_for_each_bridge_in_chain'
   - 'drm_for_each_bridge_in_chain_scoped'
   - 'drm_for_each_connector_iter'
   - 'drm_for_each_crtc'

include/drm/drm_bridge.h

@@ -1433,20 +1433,6 @@ drm_bridge_chain_get_last_bridge(struct drm_encoder *encoder)
 						      struct drm_bridge, chain_node));
 }
 
-/**
- * drm_for_each_bridge_in_chain() - Iterate over all bridges present in a chain
- * @encoder: the encoder to iterate bridges on
- * @bridge: a bridge pointer updated to point to the current bridge at each
- *	    iteration
- *
- * Iterate over all bridges present in the bridge chain attached to @encoder.
- *
- * This is deprecated, do not use!
- * New drivers shall use drm_for_each_bridge_in_chain_scoped().
- */
-#define drm_for_each_bridge_in_chain(encoder, bridge)			\
-	list_for_each_entry(bridge, &(encoder)->bridge_chain, chain_node)
-
 /**
  * drm_bridge_get_next_bridge_and_put - Get the next bridge in the chain
  *                                      and put the previous