ext4: Update EXT4_USE_FOR_EXT2 description

Configuration option EXT4_USE_FOR_EXT2 has no effect on ext3 support.
Support for ext3 is always included now.
Signed-off-by: NJean Delvare <jdelvare@suse.de>
Fixes: c290ea01 ("fs: Remove ext3 filesystem driver")
Cc: Jan Kara <jack@suse.cz>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Signed-off-by: NJan Kara <jack@suse.com>

fs/ext4/Kconfig

@@ -63,7 +63,7 @@ config EXT4_FS
 	  If unsure, say N.
 
 config EXT4_USE_FOR_EXT2
-	bool "Use ext4 for ext2/ext3 file systems"
+	bool "Use ext4 for ext2 file systems"
 	depends on EXT4_FS
 	depends on EXT2_FS=n
 	default y