perf: remove unnecessary update_winbar calls

Since the winbar is now updated automatically, it's not necessary to update it explicitly. For some
reason, however, removing the `update_winbar` call in `switch_view_type()`
(`gitlab/actions/discussions/winbar.lua`) causes a minor screen flicker, so I've kept that one in.

lua/gitlab/actions/discussions/init.lua

@@ -48,7 +48,7 @@ M.rebuild_view = function(unlinked, all)
     else
       M.rebuild_discussion_tree()
     end
-    M.refresh_diagnostics_and_winbar()
+    M.refresh_diagnostics()
   end)
 end
 
@@ -73,7 +73,7 @@ end
 M.initialize_discussions = function()
   signs.setup_signs()
   reviewer.set_callback_for_file_changed(function()
-    M.refresh_diagnostics_and_winbar()
+    M.refresh_diagnostics()
     M.modifiable(false)
     reviewer.set_reviewer_keymaps()
   end)
@@ -103,11 +103,10 @@ M.modifiable = function(bool)
 end
 
 --- Take existing data and refresh the diagnostics, the winbar, and the signs
-M.refresh_diagnostics_and_winbar = function()
+M.refresh_diagnostics = function()
   if state.settings.discussion_signs.enabled then
     diagnostics.refresh_diagnostics()
   end
-  winbar.update_winbar()
   common.add_empty_titles()
   state.discussion_tree.last_updated = os.time()
 end
@@ -156,7 +155,7 @@ M.open = function(callback)
   end
 
   vim.schedule(function()
-    M.refresh_diagnostics_and_winbar()
+    M.refresh_diagnostics()
   end)
 end
 
@@ -587,7 +586,7 @@ M.set_tree_keymaps = function(tree, bufnr, unlinked)
     if keymaps.discussion_tree.jump_to_reviewer then
       vim.keymap.set("n", keymaps.discussion_tree.jump_to_reviewer, function()
         if M.is_current_node_note(tree) then
-          common.jump_to_reviewer(tree, M.refresh_diagnostics_and_winbar)
+          common.jump_to_reviewer(tree, M.refresh_diagnostics)
         end
       end, { buffer = bufnr, desc = "Jump to reviewer", nowait = keymaps.discussion_tree.jump_to_reviewer_nowait })
     end
@@ -793,7 +792,6 @@ end
 ---Toggle between draft mode (comments posted as drafts) and live mode (comments are posted immediately)
 M.toggle_draft_mode = function()
   state.settings.discussion_tree.draft_mode = not state.settings.discussion_tree.draft_mode
-  winbar.update_winbar()
 end
 
 ---Indicates whether the node under the cursor is a draft note or not