PCU_E: remove code for yet another corpse

The PCU_E board has long reached EOL, and support for it is no longer
relevant in current versions of U-Boot.  Remove it.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/arch/powerpc/lib/board.c b/arch/powerpc/lib/board.c
index 8f6a7c9..907857b 100644
--- a/arch/powerpc/lib/board.c
+++ b/arch/powerpc/lib/board.c
@@ -107,7 +107,7 @@
 
 static char *failed = "*** failed ***\n";
 
-#if defined(CONFIG_OXC) || defined(CONFIG_PCU_E) || defined(CONFIG_RMU)
+#if defined(CONFIG_OXC) || defined(CONFIG_RMU)
 extern flash_info_t flash_info[];
 #endif
 
@@ -735,7 +735,7 @@
 #endif
 
 
-# if defined(CONFIG_PCU_E) || defined(CONFIG_OXC) || defined(CONFIG_RMU)
+# if defined(CONFIG_OXC) || defined(CONFIG_RMU)
 	/* flash mapped at end of memory map */
 	bd->bi_flashoffset = TEXT_BASE + flash_size;
 # elif CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE