GH372: Remove duplicate flags

Signed-off-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NEmilia Käsper <emilia@openssl.org>

doc/apps/genrsa.pod

@@ -10,12 +10,6 @@ B<openssl> B<genrsa>
 [B<-out filename>]
 [B<-passout arg>]
 [B<-aes128>]
-[B<-aes128>]
-[B<-aes192>]
-[B<-aes256>]
-[B<-camellia128>]
-[B<-camellia192>]
-[B<-camellia256>]
 [B<-aes192>]
 [B<-aes256>]
 [B<-camellia128>]