Make guid mandatory for Profile

Not sure why it wasn't mandatory..

federation/entities/base.py

@@ -229,11 +229,6 @@ class Profile(CreatedAtMixin, HandleMixin, RawContentMixin, PublicMixin, GUIDMix
     tag_list = []
     public_key = ""
 
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        # Don't require a guid for Profile
-        self._required.remove("guid")
-
     def validate_email(self):
         if self.email:
             validator = Email()

federation/tests/entities/test_base.py

@@ -67,6 +67,7 @@ class TestProfileEntity(object):
             entity = Profile(handle="bob@example.com", raw_content="foobar", email="foobar")
             entity.validate()
 
-    def test_guid_is_not_mandatory(self):
+    def test_guid_is_mandatory(self):
         entity = Profile(handle="bob@example.com", raw_content="foobar")
-        entity.validate()
+        with pytest.raises(ValueError):
+            entity.validate()