Python: Remove references to LGTM

python/ql/test/query-tests/Classes/conflicting/odasa6643.py

@@ -1,8 +1,6 @@
 #This code has conflicting attributes,
 #but the documentation in the standard library tells you do it this way :(
 
-#See https://discuss.lgtm.com/t/warning-on-normal-use-of-python-socketserver-mixins/677
-
 class ThreadingMixIn(object):
 
     def process_request(selfself, req):

python/ql/test/query-tests/Classes/missing-init/missing_init.py

@@ -39,7 +39,7 @@ class UVT(UT, PU):
 class IUVT(IUT, UVT):
     pass
 
-#False positive observed on LGTM
+#False positive
 class M1(object):
     def __init__(self):
         print("A")