SDL: docs: Don't put SDL_main_impl.h in the "Main" wiki documentation category.

From a19bac65218bf583e8e5cb8c52e1c9603fa8d94c Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Sat, 26 Sep 2026 00:15:53 -0400
Subject: [PATCH] docs: Don't put SDL_main_impl.h in the "Main" wiki
 documentation category.

Nothing in here has public API documentation (intentionally), and since it's
in the same category as SDL_main.h, it would overwrite its function-order list,
causing the "Main" section to be dropped from the Quick Reference pages.
---
 .wikiheaders-options         | 4 ++--
 include/SDL3/SDL_main_impl.h | 2 --
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/.wikiheaders-options b/.wikiheaders-options
index 8b333fd5c714e..4d8edda4e2cd3 100644
--- a/.wikiheaders-options
+++ b/.wikiheaders-options
@@ -21,9 +21,9 @@ wikiheaderfiletext = Defined in [<SDL3/%fname%>](https://github.com/libsdl-org/S
 manpageheaderfiletext = Defined in SDL3/%fname%
 manpagesymbolfilterregex = \A[US]int\d+\Z
 
-# All SDL_test_* headers become undefined categories, everything else just converts like SDL_audio.h -> Audio
+# All SDL_test_* headers become undefined categories, as does SDL_main_impl.h, everything else just converts like SDL_audio.h -> Audio
 # A handful of others we fix up in the header itself with /* WIKI CATEGORY: x */ comments.
-headercategoryeval = s/\ASDL_test_?.*?\.h\Z//; s/\ASDL_?(.*?)\.h\Z/$1/; ucfirst();
+headercategoryeval = s/\ASDL_test_?.*?\.h\Z//; s/\ASDL_main_impl\.h\Z//; s/\ASDL_?(.*?)\.h\Z/$1/; ucfirst();
 
 quickrefenabled = 1
 quickrefcategoryorder = Init,Hints,Error,Version,Properties,Log,Video,Events,Keyboard,Mouse,Touch,Gamepad,Joystick,Haptic,Audio,Time,Timer,Render,SharedObject,Thread,Mutex,Atomic,Filesystem,IOStream,AsyncIO,Storage,Pixels,Surface,Blendmode,Rect,Camera,Messagebox,Clipboard,Dialog,Tray,Notification,GPU,Vulkan,Metal,Platform,Power,Sensor,Process,Bits,Endian,Assert,CPUInfo,Intrinsics,Locale,System,Misc,GUID,Main,Stdinc
diff --git a/include/SDL3/SDL_main_impl.h b/include/SDL3/SDL_main_impl.h
index f5307ceb345a9..37442aa870eae 100644
--- a/include/SDL3/SDL_main_impl.h
+++ b/include/SDL3/SDL_main_impl.h
@@ -19,8 +19,6 @@
   3. This notice may not be removed or altered from any source distribution.
 */
 
-/* WIKI CATEGORY: Main */
-
 #ifndef SDL_main_impl_h_
 #define SDL_main_impl_h_