Make LMOTS a private api

Signed-off-by: Raef Coles <raef.coles@arm.com>
diff --git a/scripts/generate_errors.pl b/scripts/generate_errors.pl
index d333f65..41b0337 100755
--- a/scripts/generate_errors.pl
+++ b/scripts/generate_errors.pl
@@ -47,7 +47,7 @@
 
 my @low_level_modules = qw( AES ARIA ASN1 BASE64 BIGNUM
                             CAMELLIA CCM CHACHA20 CHACHAPOLY CMAC CTR_DRBG DES
-                            ENTROPY ERROR GCM HKDF HMAC_DRBG LMS LMOTS MD5
+                            ENTROPY ERROR GCM HKDF HMAC_DRBG LMS MD5
                             NET OID PADLOCK PBKDF2 PLATFORM POLY1305 RIPEMD160
                             SHA1 SHA256 SHA512 THREADING );
 my @high_level_modules = qw( CIPHER DHM ECP MD