Removed function declaration from interface

Backend/tools-services/src/main/java/com/r11/tools/xml/Saxon.java

@@ -164,9 +164,4 @@ public class Saxon implements XmlEngine{
     public String getVersion() {
         return "Saxon " + new Processor(false).getSaxonProductVersion();
     }
-
-    @Override
-    public String addParam(String data, String processorData) throws Exception {
-        return null;
-    }
 }

Backend/tools-services/src/main/java/com/r11/tools/xml/Xalan.java

@@ -124,11 +124,6 @@ public class Xalan implements XmlEngine{
         return org.apache.xalan.Version.getVersion();
     }
 
-    @Override
-    public String addParam(String data, String processorData) throws Exception {
-        return null;
-    }
-
     /**
      * Validates string representation of the xml document against xsd schema
      * @param data xml document

Backend/tools-services/src/main/java/com/r11/tools/xml/XmlEngine.java

@@ -11,5 +11,4 @@ public interface XmlEngine {
     String validate(String data, String xsd) throws Exception;
     String executeXQuery(String data, String xquery, String version) throws Exception;
     public String getVersion();
-    String addParam(String processorData, String paramName, String paramValue) throws Exception;
 }