fs: clean up around fs_type

fs_ls(), fs_mkdir() and fs_unlink() sets fs_type to FS_TYPE_ANY
explicitly, but it is redundant as they call fs_close().
So just remove those lines.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/fs/fs.c b/fs/fs.c
index 64ba25f..b17b76a 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -413,7 +413,6 @@
 
 	ret = info->ls(dirname);
 
-	fs_type = FS_TYPE_ANY;
 	fs_close();
 
 	return ret;
@@ -597,7 +596,6 @@
 
 	ret = info->unlink(filename);
 
-	fs_type = FS_TYPE_ANY;
 	fs_close();
 
 	return ret;
@@ -611,7 +609,6 @@
 
 	ret = info->mkdir(dirname);
 
-	fs_type = FS_TYPE_ANY;
 	fs_close();
 
 	return ret;