remove 5gb wasted space by removing precompiled headers

unityhook/config.c

@@ -1,3 +1,5 @@
+#include <stdlib.h>
+
 #include "config.h"
 
 void unity_config_load(struct unity_config *cfg, const wchar_t *filename) {

unityhook/doorstop.c

@@ -4,6 +4,8 @@
 // SPDX-License-Identifier: CC0
 // https://github.com/NeighTools/UnityDoorstop
 #include <stdbool.h>
+#include <stdlib.h>
+#include <wchar.h>
 
 #include <pathcch.h>
 #include <psapi.h>

unityhook/hook.c

@@ -1,5 +1,7 @@
 #include <assert.h>
 #include <stdbool.h>
+#include <stdlib.h>
+#include <wchar.h>
 
 #include "platform/clock.h"
 

unityhook/meson.build

@@ -2,7 +2,6 @@ unityhook_lib = static_library(
     'unityhook',
     include_directories: inc,
     implicit_include_directories: false,
-    c_pch: '../precompiled.h',
     dependencies: [
         capnhook.get_variable('hook_dep'),
         pathcch_lib