scripts: generate_errors: remove DHM occurrence

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/scripts/generate_errors.pl b/scripts/generate_errors.pl
index c051842..aae1fc8 100755
--- a/scripts/generate_errors.pl
+++ b/scripts/generate_errors.pl
@@ -40,7 +40,7 @@
                             ENTROPY ERROR GCM HKDF HMAC_DRBG LMS MD5
                             NET OID PBKDF2 PLATFORM POLY1305 RIPEMD160
                             SHA1 SHA256 SHA512 SHA3 THREADING );
-my @high_level_modules = qw( CIPHER DHM ECP MD
+my @high_level_modules = qw( CIPHER ECP MD
                              PEM PK PKCS12 PKCS5
                              RSA SSL X509 PKCS7 );