powerpc/configs/64s: Drop JFS Filesystem

Unlikely that anyone is still regularly using JFS, drop it from the
defconfig.
Suggested-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230420051609.1324201-2-mpe@ellerman.id.au

arch/powerpc/configs/ppc64_defconfig

@@ -322,9 +322,6 @@ CONFIG_LIBNVDIMM=y
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_EXT4_FS_SECURITY=y
-CONFIG_JFS_FS=m
-CONFIG_JFS_POSIX_ACL=y
-CONFIG_JFS_SECURITY=y
 CONFIG_XFS_FS=y
 CONFIG_XFS_POSIX_ACL=y
 CONFIG_BTRFS_FS=m