Shell integration: Dont override fish's native title setting functionality

See discussion: https://github.com/fish-shell/fish-shell/issues/8641

docs/changelog.rst

@@ -95,11 +95,11 @@ Detailed list of changes
   rather than a plane. This means the first and last window are considered
   neighbors (:iss:`4494`)
 
-- Shell integration: Fix cursor shape not working with fish's vi mode
+- Shell integration: fish: Fix cursor shape not working with fish's vi mode
   (:iss:`4508`)
 
-- Shell integration: fish: Only override fish_title if it has not been set by
-  the user (:iss:`4452`)
+- Shell integration: fish: Dont override fish's native title setting functionality.
+  See `discussion https://github.com/fish-shell/fish-shell/issues/8641`__.
 
 - macOS: Fix hiding via :kbd:`cmd+h` not working on macOS 10.15.7 (:iss:`4472`)
 

docs/shell-integration.rst

@@ -26,7 +26,7 @@ Features
   to view it in a pager
 
 * The current working directory or the command being executed are automatically
-  displayed in the kitty window titlebar/tab title.
+  displayed in the kitty window titlebar/tab title
 
 * The text cursor is changed to a bar when editing commands at the shell prompt
 
@@ -58,7 +58,9 @@ no-cursor
     Turn off changing of the text cursor to a bar when editing text
 
 no-title
-    Turn off setting the kitty window/tab title based on shell state
+    Turn off setting the kitty window/tab title based on shell state.
+    Note that for the ``fish`` shell kitty relies on fish's native title
+    setting functionality instead.
 
 no-prompt-mark
     Turn off marking of prompts. This disables jumping to prompt, browsing

shell-integration/fish/vendor_conf.d/kitty-shell-integration.fish

@@ -76,24 +76,6 @@ function _ksi_main
         functions --erase _ksi_set_vi_cursor
     end
 
-    if not contains "no-title" $_ksi
-        function _ksi_function_is_not_overridden -d "Check if the specified function is not overridden"
-            functions --details $argv[1] | string match -q -- "$__fish_data_dir/functions/*"
-        end
-
-        if _ksi_function_is_not_overridden fish_title
-            function fish_title
-                if set -q argv[1]
-                    echo $argv[1]
-                else
-                    prompt_pwd
-                end
-            end
-        end
-
-        functions --erase _ksi_function_is_not_overridden
-    end
-
     if not contains "no-prompt-mark" $_ksi
         and not functions -q _ksi_mark
         set --global _ksi_prompt_state "first-run"