arm: remove useless code in start.S files

Remove code such as unneeded includes or labels.
These removals have no functional effect.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>

arch/arm/cpu/arm925t/start.S

@@ -34,10 +34,6 @@
 #include <config.h>
 #include <version.h>
 
-#if defined(CONFIG_OMAP1510)
-#include <./configs/omap1510.h>
-#endif
-
 /*
  *************************************************************************
  *

arch/arm/cpu/arm926ejs/start.S

@@ -36,12 +36,6 @@
 #include <common.h>
 #include <version.h>
 
-#if defined(CONFIG_OMAP1610)
-#include <./configs/omap1510.h>
-#elif defined(CONFIG_OMAP730)
-#include <./configs/omap730.h>
-#endif
-
 /*
  *************************************************************************
  *