remove -Wno-deprecated-declarations flag when building with c++NN

cmake/Modules/ClhepVariables.cmake

@@ -181,9 +181,9 @@ macro( _clhep_check_cxxstd )
   ##message(STATUS "_clhep_check_cxxstd debug: CLHEP_BUILD_CXXSTD HAVE_STDCXX: ${CLHEP_BUILD_CXXSTD} ${HAVE_STDCXX}")
   if( DEFINED HAVE_STDCXX )
     if( ${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang" )
-	set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CLHEP_BUILD_CXXSTD} -pthread -Wno-deprecated-declarations" )
+	set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CLHEP_BUILD_CXXSTD} -pthread" )
     elseif(CMAKE_COMPILER_IS_GNUCXX)
-	set( CMAKE_CXX_FLAGS "${CLHEP_BUILD_CXXSTD} -pthread -Wno-deprecated-declarations ${CMAKE_CXX_FLAGS}" )
+	set( CMAKE_CXX_FLAGS "${CLHEP_BUILD_CXXSTD} -pthread ${CMAKE_CXX_FLAGS}" )
     else()
       message(STATUS "clhep_set_compiler_flags: Do not know how to set c++11 extensions for ${CMAKE_CXX_COMPILER_ID}")
     endif()