Remove generation of unused nullNode variables in parsers

src/main/java/org/sablecc/sablecc/GenerateAlternativeCodeForParser.java

@@ -81,7 +81,7 @@ public class GenerateAlternativeCodeForParser extends DepthFirstAdapter
         }
         else if(type_name.equals("null"))
         {
-          macros.apply(file, "ParserNullVariableDeclaration", new String[] {"" + position});
+          // No intermediate variable needed for null arguments
         }
         else
         {
@@ -168,7 +168,7 @@ public class GenerateAlternativeCodeForParser extends DepthFirstAdapter
         }
         else if(type_name.equals("null"))
         {
-          macros.apply(file, "ParserNullVariableDeclaration", new String[] {"" + position});
+          // No intermediate variable needed for null arguments
         }
         else
         {
@@ -382,7 +382,7 @@ public class GenerateAlternativeCodeForParser extends DepthFirstAdapter
         }
         else if(type_name.equals("null"))
         {
-          macros.apply(file, "ParserNullVariableDeclaration", new String[] {"" + position});
+          // No intermediate variable needed for null arguments
         }
         else
         {

src/main/resources/org/sablecc/sablecc/parser.txt

@@ -428,11 +428,6 @@ Macro:ParserListVariableDeclaration
 
 $
 
-Macro:ParserNullVariableDeclaration
-        Object nullNode$0$ = null;
-
-$
-
 Macro:ParserSimpleTerm
         $0$Node$1$ = ($2$)nodeArrayList$3$.get($4$);