zynq: zc770: Remove unused ifdefs for xm011 and xm013

Clean config file.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

include/configs/zynq_zc770.h

@@ -17,13 +17,9 @@
 #if defined(CONFIG_ZC770_XM010)
 # define CONFIG_ZYNQ_SDHCI0
 
-#elif defined(CONFIG_ZC770_XM011)
-
 #elif defined(CONFIG_ZC770_XM012)
 # undef CONFIG_SYS_NO_FLASH
 
-#elif defined(CONFIG_ZC770_XM013)
-
 #endif
 
 #include <configs/zynq-common.h>