rem. duplicate method

src/ua/UAMethod.ts

@@ -30,16 +30,6 @@ export class UAMethod extends UABaseNode {
         elem.attr("Executable", this.executable.toString());
         return elem;
     }
-
-    getModellingRule(){
-        let res:any = "";
-        this.references.forEach((ref)=>{
-            if(ref.referenceType == "HasModellingRule"){
-                res = ref.toNode.browseName;
-            }
-        })
-        return res;
-    }
 }
 
 export interface UAMethodNodeOptions extends UABaseNodeOptions{