fix(config): remove useless config option

doc/fugitive-ts.nvim.txt

@@ -70,10 +70,6 @@ CONFIGURATION                                               *fugitive-ts-config*
                              Vim syntax highlighting options (experimental).
                              See |fugitive-ts.VimConfig| for fields.
 
-        {diffsplit}           (table, default: see below)
-                             Diffsplit highlighting options.
-                             See |fugitive-ts.DiffsplitConfig| for fields.
-
         {highlights}         (table, default: see below)
                              Controls which highlight features are enabled.
                              See |fugitive-ts.Highlights| for fields.
@@ -102,15 +98,6 @@ CONFIGURATION                                               *fugitive-ts-config*
                              this many lines. Lower than the treesitter default
                              due to the per-character cost of |synID()|.
 
-                                                 *fugitive-ts.DiffsplitConfig*
-    Diffsplit config fields: ~
-        {enabled}            (boolean, default: true)
-                             Override diff highlight foreground colors in
-                             |:Gdiffsplit| and |:Gvdiffsplit| windows so
-                             treesitter syntax is visible through the diff
-                             backgrounds. Uses window-local 'winhighlight'
-                             and only applies to fugitive-owned buffers.
-
                                                        *fugitive-ts.Highlights*
     Highlights table fields: ~
         {background}         (boolean, default: true)

lua/fugitive-ts/init.lua

@@ -10,9 +10,6 @@
 ---@field enabled boolean
 ---@field max_lines integer
 
----@class fugitive-ts.DiffsplitConfig
----@field enabled boolean
-
 ---@class fugitive-ts.Config
 ---@field enabled boolean
 ---@field debug boolean
@@ -21,7 +18,6 @@
 ---@field treesitter fugitive-ts.TreesitterConfig
 ---@field vim fugitive-ts.VimConfig
 ---@field highlights fugitive-ts.Highlights
----@field diffsplit fugitive-ts.DiffsplitConfig
 
 ---@class fugitive-ts
 ---@field attach fun(bufnr?: integer)
@@ -85,9 +81,6 @@ local default_config = {
     background = true,
     gutter = true,
   },
-  diffsplit = {
-    enabled = true,
-  },
 }
 
 ---@type fugitive-ts.Config
@@ -249,7 +242,7 @@ local DIFF_WINHIGHLIGHT = table.concat({
 }, ',')
 
 function M.attach_diff()
-  if not config.enabled or not config.diffsplit.enabled then
+  if not config.enabled then
     return
   end
 
@@ -301,15 +294,8 @@ function M.setup(opts)
     treesitter = { opts.treesitter, 'table', true },
     vim = { opts.vim, 'table', true },
     highlights = { opts.highlights, 'table', true },
-    diffsplit = { opts.diffsplit, 'table', true },
   })
 
-  if opts.diffsplit then
-    vim.validate({
-      ['diffsplit.enabled'] = { opts.diffsplit.enabled, 'boolean', true },
-    })
-  end
-
   if opts.treesitter then
     vim.validate({
       ['treesitter.enabled'] = { opts.treesitter.enabled, 'boolean', true },