fix(decoration): do not restart win_update() after calling providers

This is likely no longer needed after #20665

src/nvim/drawscreen.c

@@ -956,9 +956,6 @@ static void draw_sep_connectors_win(win_T *wp)
 /// bot: from bot_start to last row (when scrolled up)
 static void win_update(win_T *wp, DecorProviders *providers)
 {
- bool called_decor_providers = false;
-win_update_start:
- ;
  int top_end = 0; // Below last row of the top area that needs
  // updating. 0 when no top area updating.
  int mid_start = 999; // first row of the mid area that needs
@@ -1028,13 +1025,6 @@ static void win_update(win_T *wp, DecorProviders *providers)
 
  DecorProviders line_providers;
  decor_providers_invoke_win(wp, providers, &line_providers, &provider_err);
- if (must_redraw != 0) {
- must_redraw = 0;
- if (!called_decor_providers) {
- called_decor_providers = true;
- goto win_update_start;
- }
- }
 
  redraw_win_signcol(wp);