removing deduplicatin of flags

Author: Bimba Shrestha

build/cmake/CMakeModules/AddZstdCompilationFlags.cmake

@@ -60,7 +60,6 @@ macro(ADD_ZSTD_COMPILATION_FLAGS)
              CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
         if( ${flag_var} )
             separate_arguments(${flag_var})
-            list(REMOVE_DUPLICATES ${flag_var})
             string(REPLACE ";" " " ${flag_var} "${${flag_var}}")
         endif()
     endforeach ()