Remove redundant check

Author: sualeh

schemacrawler-ai-core/src/main/java/schemacrawler/tools/ai/tools/FunctionCallback.java

@@ -19,7 +19,6 @@
 import java.util.logging.Logger;
 import schemacrawler.schema.Catalog;
 import schemacrawler.tools.ai.functions.ExceptionFunctionReturn;
-import schemacrawler.tools.ai.functions.JsonFunctionReturn;
 import us.fatehi.utility.property.PropertyName;
 import us.fatehi.utility.string.StringFormat;
 
@@ -64,10 +63,6 @@ public FunctionReturn execute(final String argumentsString, final Connection con
           String.format("Executing%n%s", toCallObject(argumentsString).toPrettyString()));
     }
 
-    if (functionDefinition == null) {
-      return new JsonFunctionReturn();
-    }
-
     try {
       final P arguments = instantiateArguments(argumentsString);