Remove unused method of `AsmClassGenerator`(master only)
diff --git a/src/main/java/org/codehaus/groovy/classgen/AsmClassGenerator.java b/src/main/java/org/codehaus/groovy/classgen/AsmClassGenerator.java
index 9d40e88..0888a3b 100644
--- a/src/main/java/org/codehaus/groovy/classgen/AsmClassGenerator.java
+++ b/src/main/java/org/codehaus/groovy/classgen/AsmClassGenerator.java
@@ -29,7 +29,6 @@
 import org.codehaus.groovy.ast.CompileUnit;
 import org.codehaus.groovy.ast.ConstructorNode;
 import org.codehaus.groovy.ast.FieldNode;
-import org.codehaus.groovy.ast.GenericsType;
 import org.codehaus.groovy.ast.InnerClassNode;
 import org.codehaus.groovy.ast.InterfaceHelperClassNode;
 import org.codehaus.groovy.ast.MethodNode;
@@ -364,9 +363,6 @@
         return modifiers;
     }
 
-    public void visitGenericType(final GenericsType genericsType) {
-    }
-
     @Override
     protected void visitConstructorOrMethod(final MethodNode node, final boolean isConstructor) {
         controller.resetLineNumber();