When you create an ABL Web App project, by default the merge.template file is available in the <prj>/PASOEContent/WEB-INF/tlr location, with the default values for all supported transports. You can update the default values of these transports by editing the values in the merge.template file.
For example, if you do not support SOAP clients, you can change the SOAP transport’s adapterEnabled property in the merge.template file from 1 to 0 as shown below:
# Transport properties for the SOAP protocol
[${oepas-app}.${oepas-webapp}.SOAP]
       adapterEnabled=0
       adminEnabled=1
       adminSoapAction=urn:services-progress-com:wsa-admin:01
       debugClients=
       wsaUrl=http://${psc.as.host.name}:${psc.as.http.port}/${oepas-webapp}/soap
       wsdlEnabled=1

The modified values (if any) are considered at the time of publishing the application for the first time and exporting the application as a complete Web Application, but not if you are exporting it incrementally.