code cleanup.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1966 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/drivers/sdio/SConscript

 Import('RTT_ROOT')
 from building import *
 
-cwd     = GetCurrentDir()
-
+cwd = GetCurrentDir()
 src = Split("""
 block_dev.c
 mmcsd_core.c

components/drivers/sdio/sd.c

@@ -275,9 +275,6 @@ err1:
 	return err;
 }
 
-
-
-
 static rt_err_t mmcsd_app_cmd(struct rt_mmcsd_host *host, struct rt_mmcsd_card *card)
 {
 	rt_err_t err;