drm/display: bridge-connector: remove unused variable assignment

The 'bridge' pointer started being assigned and used within this 'if' scope
in commit 0beba3f ("drm/bridge: connector: add support for HDMI codec
framework").

After that, commit 5d04b41 ("drm/bridge: split HDMI Audio from
DRM_BRIDGE_OP_HDMI") removed the code dereferencing it from the same 'if'
scope, but did not remove the assignment.

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20250808-drm-bridge-alloc-getput-for_each_bridge-v2-2-edb6ee81edf1@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

Author: lucaceresoli

drivers/gpu/drm/display/drm_bridge_connector.c

@@ -776,8 +776,6 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
 		if (!connector->ycbcr_420_allowed)
 			supported_formats &= ~BIT(HDMI_COLORSPACE_YUV420);
 
-		bridge = bridge_connector->bridge_hdmi;
-
 		ret = drmm_connector_hdmi_init(drm, connector,
 					       bridge_connector->bridge_hdmi->vendor,
 					       bridge_connector->bridge_hdmi->product,