Updating net_4_x profile to match what upstream mono uses for defines. In theory there should be no need to have UNITY or UNITY_AOT defines in a generic profile.

Author: UnityAlex

mcs/build/profiles/net_4_x.make

@@ -11,7 +11,7 @@ profile-check:
 	@:
 
 DEFAULT_REFERENCES = mscorlib
-PROFILE_MCS_FLAGS = -d:NET_4_0 -d:NET_4_5 -d:NET_4_6 -d:MONO -d:UNITY_AOT -d:UNITY -d:WIN_PLATFORM -nowarn:1699 -nostdlib $(PLATFORM_DEBUG_FLAGS)
+PROFILE_MCS_FLAGS = -d:NET_4_0 -d:NET_4_5 -d:NET_4_6 -d:MONO -d:WIN_PLATFORM -nowarn:1699 -nostdlib $(PLATFORM_DEBUG_FLAGS)
 API_BIN_PROFILE = v4.7.1
 
 FRAMEWORK_VERSION = 4.5