[ENSCORESW-735]. Supress ID for SimpleFeatures.

The ID for simple features seem to be poorly defined and repetitive. Better
to supress for the sake of GFF3.

modules/Bio/EnsEMBL/SimpleFeature.pm

@@ -181,6 +181,7 @@ sub summary_as_hash {
   $hash->{score} = $self->score() if $self->score();
   $hash->{'external_name'} = $self->display_label() if $self->display_label();
   $hash->{'logic_name'} = $self->analysis->logic_name();
+  delete $hash-{ID};
   return $hash;
 }