drop unneeded defines

Change-Id: I99e03c09aa1c0f3ebdfe1969b2231e07361673e6
Reviewed-on: https://gerrit.libreoffice.org/43978Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>

external/libcdr/ExternalProject_libcdr.mk

@@ -36,8 +36,7 @@ $(call gb_ExternalProject_get_state_target,libcdr,build) :
 			--disable-werror \
 			--disable-weffc \
 			$(if $(verbose),--disable-silent-rules,--enable-silent-rules) \
-			CXXFLAGS="$(CXXFLAGS) $(ICU_UCHAR_TYPE) $(BOOST_CPPFLAGS) \
-				-DBOOST_ERROR_CODE_HEADER_ONLY -DBOOST_SYSTEM_NO_DEPRECATED" \
+			CXXFLAGS="$(CXXFLAGS) $(ICU_UCHAR_TYPE) $(BOOST_CPPFLAGS)" \
 			$(if $(CROSS_COMPILING),--build=$(BUILD_PLATFORM) --host=$(HOST_PLATFORM)) \
 		&& $(MAKE) \
 	)