Don't create domain objects on demand just by property reference

This change slipped in. I didn't intend to change this functionality.

subprojects/core/src/main/groovy/org/gradle/api/internal/ConfigureDelegate.java

@@ -87,8 +87,6 @@ public Object get(String name) {
             // Ignore
         }
 
-        onMissing.execute(name);
-
         // try the delegate again
         return delegate.getProperty(name);
     }