include/configs: drop default definitions of CONFIG_SYS_PBSIZE

Now that the fallback value of CONFIG_SYS_PBSIZE in
include/config_fallbacks.h has been adjusted, remove its definition
from a large number of board configuration files.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/zipitz2.h b/include/configs/zipitz2.h
index 87f3a4c..b4577a7 100644
--- a/include/configs/zipitz2.h
+++ b/include/configs/zipitz2.h
@@ -80,7 +80,7 @@
 #endif
 
 #define	CONFIG_SYS_LONGHELP				/* undef to save memory	*/
-#define	CONFIG_SYS_PBSIZE		(CONFIG_SYS_CBSIZE+sizeof(CONFIG_SYS_PROMPT)+16)	/* Print Buffer Size */
+
 #define	CONFIG_SYS_MAXARGS		16		/* max number of command args */
 #define	CONFIG_SYS_BARGSIZE		CONFIG_SYS_CBSIZE	/* Boot Argument Buffer Size */
 #define	CONFIG_SYS_DEVICE_NULLDEV	1