[System.ComponentModel.DataAnnotations] Makefile clean-up

mcs/class/System.ComponentModel.DataAnnotations/Makefile

@@ -11,13 +11,4 @@ LIB_MCS_FLAGS = \
 
 TEST_MCS_FLAGS = $(LIB_MCS_FLAGS)
 
-# This is a .NET 3.5+ assembly
-VALID_PROFILE := $(filter net_4_5 monotouch monodroid xammac mobile mobile_static, $(PROFILE))
-ifndef VALID_PROFILE
-LIBRARY_NAME = dummy-System.ComponentModel.DataAnnotations.dll
-NO_INSTALL = yes
-NO_SIGN_ASSEMBLY = yes
-NO_TEST = yes
-endif
-
 include ../../build/library.make