fs/btrfs: remove depends on CONFIG_EXPERIMENTAL

The CONFIG_EXPERIMENTAL config item has not carried much meaning for a
while now and is almost always enabled by default. As agreed during the
Linux kernel summit, remove it from any "depends on" lines in Kconfigs.

Cc: Chris Mason <chris.mason@fusionio.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/btrfs/Kconfig

 config BTRFS_FS
-	tristate "Btrfs filesystem (EXPERIMENTAL) Unstable disk format"
-	depends on EXPERIMENTAL
+	tristate "Btrfs filesystem Unstable disk format"
 	select LIBCRC32C
 	select ZLIB_INFLATE
 	select ZLIB_DEFLATE