Remove unused kwnames generated variable in Ruby wrappers

This seems to be from some left over Python kwargs / unfinished kwargs support

Source/Modules/octave.cxx

@@ -469,7 +469,6 @@ public:
         value = Getattr(p, "tmap:doc:value");
       }
 
-      // Note: the generated name should be consistent with that in kwnames[]
       name = name ? name : Getattr(p, "name");
       name = name ? name : Getattr(p, "lname");
       name = Swig_name_make(p, 0, name, 0, 0); // rename parameter if a keyword

Source/Modules/ruby.cxx

@@ -1546,7 +1546,8 @@ public:
     /* Finish argument marshalling */
     Printf(kwargs, " NULL }");
     if (allow_kwargs) {
-      Printv(f->locals, tab4, "const char *kwnames[] = ", kwargs, ";\n", NIL);
+// kwarg support not implemented
+//      Printv(f->locals, tab4, "const char *kwnames[] = ", kwargs, ";\n", NIL);
     }
 
     /* Trailing varargs */
@@ -3473,6 +3474,7 @@ public:
    *--------------------------------------------------------------------*/
 
   bool kwargsSupport() const {
+    // kwargs support isn't actually implemented, but changing to return false may break something now as it turns on compactdefaultargs
     return true;
   }
 };				/* class RUBY */