x86: remove two duplicated funcs in setup_32.c

early_cpu_init is declared in processor.h
memory_setup is defined in e820.c
Signed-off-by: NYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/setup_32.c

@@ -206,7 +206,6 @@ struct ist_info ist_info;
 EXPORT_SYMBOL(ist_info);
 #endif
 
-extern void early_cpu_init(void);
 extern int root_mountflags;
 
 unsigned long saved_video_mode;