Fix #130053: ALT+H in weight paint not unhiding bones

When in bone selection mode of during weight painting,
pressing ALT+H would unhide faces instead of bones.
Removing the keymap entry fixes that, while still allowing
unhiding of faces in face mask mode.

Pull Request: https://projects.blender.org/blender/blender/pulls/131104

scripts/presets/keyconfig/keymap_data/blender_default.py

@@ -5483,7 +5483,6 @@ def km_weight_paint(params):
         ("wm.context_toggle", {"type": 'S', "value": 'PRESS', "shift": True},
          {"properties": [("data_path", 'tool_settings.weight_paint.brush.use_smooth_stroke')]}),
         op_menu_pie("VIEW3D_MT_wpaint_vgroup_lock_pie", {"type": 'K', "value": 'PRESS'}),
-        ("paint.face_vert_reveal", {"type": 'H', "value": 'PRESS', "alt": True}, None),
         *_template_items_context_panel("VIEW3D_PT_paint_weight_context_menu", params.context_menu_event),
     ])