bcachefs: Remove unnecessary softdep on xxhash

As with the other algorithms, bcachefs does not access xxhash through
the crypto API.  So there is no need to use a module softdep to ensure
that it is loaded.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/super.c

@@ -74,7 +74,6 @@
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Kent Overstreet <kent.overstreet@gmail.com>");
 MODULE_DESCRIPTION("bcachefs filesystem");
-MODULE_SOFTDEP("pre: xxhash");
 
 const char * const bch2_fs_flag_strs[] = {
 #define x(n)		#n,