Revert "ifndef"

This reverts commit 9afb676.

Author: krlmlr

inst/include/cpp11/R.hpp

@@ -10,12 +10,8 @@
 #endif
 #endif
 
-#ifndef R_NO_REMAP
 #define R_NO_REMAP
-#endif
-#ifndef STRICT_R_HEADERS
 #define STRICT_R_HEADERS
-#endif
 #include "R_ext/Boolean.h"
 #include "Rinternals.h"
 #include "Rversion.h"