message: remove obsoleted define
diff: @@ -14,7 +14,7 @@ CC_x86_64-pc-linux-gnu = GCC
  CC_i686-pc-cygwin = ICC
  INCLUDEPATHS = include code base merger-ca cagpubuild
  -DEFINES = HLTCA_STANDALONE BUILD_GPU
  +DEFINES = HLTCA_STANDALONE
  EXTRAFLAGSGCC = -Weffc++ -Wno-unused-local-typedefs
  