remove default source/targets

Author: johnsteele

plugins/org.jboss.tools.windup.ui/src/org/jboss/tools/windup/ui/internal/launch/WindupLaunchDelegate.java

@@ -195,10 +195,10 @@ public void done(IJobChangeEvent event) {
 			}
         }
     	if (targets.isEmpty()) {
-    		targets.add("quarkus");
+//    		targets.add("quarkus");
     	}
     	if (sources.isEmpty()) {
-    		sources.add("springboot");
+//    		sources.add("springboot");
     	}
 
     	IssueExplorer.current.viewService.launchStarting();