tpmr: Delete outdated TODO in tpm2_seal

The sealing password is now hashed, so there's no length limit.

Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>

initrd/bin/tpmr

@@ -291,8 +291,6 @@ tpm2_seal() {
 	# (The default is to allow either policy auth _or_ password auth.  In
 	# this case the policy includes the password, and we don't want to allow
 	# the password on its own.)
-	# TODO: Providing the password directly limits it to the size of the
-	# largest hash supported by the TPM (at least 32 chars for sha256)
 	tpm2 create -Q -C "/tmp/$PRIMARY_HANDLE_FILE" \
 		-i "$file" \
 		-u "$SECRET_DIR/$bname.priv" \