docs: remove info about bg support as neovim/neovim#26037 is merged

Author: Bekaboo

README.md

@@ -130,14 +130,6 @@ https://github.com/Bekaboo/dropbar.nvim/assets/76579810/e8c1ac26-0321-4762-9975-
 
   ![scrollbar](https://github.com/Bekaboo/dropbar.nvim/assets/76579810/ace94d9a-e850-4a6b-9ab3-51a290e5af32)
 
-- [x] Background color support<super>*</super> thanks [@theofabilous](https://github.com/theofabilous)
-
-  ![background-color](https://github.com/Bekaboo/dropbar.nvim/assets/76579810/d7794098-9dcf-459e-9763-8b7d9414e035)
-
-  - This is currently an experimental feature that is only available in branch
-    [`feat-winbar-background-highlight`](https://github.com/Bekaboo/dropbar.nvim/tree/feat-winbar-background-highlight).
-  - To achieve the same effect in branch [`master`](https://github.com/Bekaboo/dropbar.nvim/tree/master), see discussions in [#2](https://github.com/Bekaboo/dropbar.nvim/issues/2)
-
 - [ ] Add preview for symbols shown in the winbar
 
 - [ ] Preview symbols (files) from `path` source

doc/dropbar.txt

@@ -80,12 +80,6 @@ highly-customizable 'winbar' with drop-down menu support and mutiple backends.
   drop-down menu
 - Reorient the source window on previewing or after jumping to a symbol
 - Add scrollbar to the menu when the symbol list is too long
-- Background color support thanks @theofabilous
-  <https://github.com/theofabilous>
-  - This is currently an experimental feature that is only available in branch
-    `feat-winbar-background-highlight`.
-  - To achieve the same effect in branch`master`, see discussions in
-    <https://github.com/Bekaboo/dropbar.nvim/issues/2>
 
 TODO