Add a precompiled header for RELs (#2597)

src/d/d_menu_skill.cpp

@@ -3,6 +3,8 @@
  * Menu - Hidden Skills
  */
 
+#include "d/dolzel.h"
+
 #include "d/d_menu_skill.h"
 #include "JSystem/J2DGraph/J2DTextBox.h"
 #include "JSystem/JKernel/JKRMemArchive.h"
@@ -15,11 +17,6 @@
 #include "m_Do/m_Do_controller_pad.h"
 #include "m_Do/m_Do_graphic.h"
 
-/* 803BE7D8-803BE7E4 01B8F8 000C+00 1/1 0/0 0/0 .data            cNullVec__6Z2Calc */
-static u8 cNullVec__6Z2Calc[12] = {
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-};
-
 typedef void (dMenu_Skill_c::*initFunc)();
 static initFunc map_init_process[] = {
     &dMenu_Skill_c::wait_init,