cmd/goyacc: remove unused generated bindings

Found with honnef.co/go/tools/cmd/unused (in CockroachDB).

Change-Id: I0e2f7ac6ad2a0fdc724928f316060f06c3261ece
Reviewed-on: https://go-review.googlesource.com/38178
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
diff --git a/cmd/goyacc/yacc.go b/cmd/goyacc/yacc.go
index fdf8156..50580c0 100644
--- a/cmd/goyacc/yacc.go
+++ b/cmd/goyacc/yacc.go
@@ -2269,11 +2269,7 @@
 
 	fmt.Fprintf(ftable, "}\n")
 	ftable.WriteRune('\n')
-	fmt.Fprintf(ftable, "const %sNprod = %v\n", prefix, nprod)
 	fmt.Fprintf(ftable, "const %sPrivate = %v\n", prefix, PRIVATE)
-	ftable.WriteRune('\n')
-	fmt.Fprintf(ftable, "var %sTokenNames []string\n", prefix)
-	fmt.Fprintf(ftable, "var %sStates []string\n", prefix)
 }
 
 //