isFree is no longer part of the API

git-svn-id: https://svn.r-project.org/R/trunk@87883 00db46b3-68df-0310-9c12-caf00c1e9a41

Author: ripley

src/include/Rinternals.h

@@ -964,7 +964,7 @@ void R_orderVector1(int *indx, int n, SEXP x,       Rboolean nalast, Rboolean de
 #define isExpression		Rf_isExpression
 #define isFactor		Rf_isFactor
 #define isFrame			Rf_isFrame
-#define isFree			Rf_isFree
+// #define isFree			Rf_isFree
 #define isFunction		Rf_isFunction
 #define isInteger		Rf_isInteger
 #define isLanguage		Rf_isLanguage