kernel/crash: remove inclusion of crypto/sha1.h

kernel/crash: remove inclusion of crypto/sha1.h

Several files related to kernel crash dumps include crypto/sha1.h but
never use any of its functionality.  Remove these includes so that these
files don't unnecessarily come up in searches for which kernel code is
still using the obsolete SHA-1 algorithm.

Link: https://lkml.kernel.org/r/20260314204243.45001-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>