SWDEV-407533 - [ABI Break]Purge unused env vars

Change-Id: I627950e8ebb6299affc602754a20d442dbe42b14


[ROCm/clr commit: 077311153a]

projects/clr/rocclr/utils/macros.hpp

@@ -178,12 +178,6 @@
 #define ALWAYSINLINE
 #endif  // !_MSC_VER
 
-#ifdef BRAHMA
-#define IS_BRAHMA true
-#else
-#define IS_BRAHMA false
-#endif
-
 //! \endcond
 
 #endif  // MACROS_HPP_