Remove TODO file

TODO.txt

-PENDING:
-- no rule is composed for IPM controller
-- no rule is composed for L2VPN TFS SBI
-- pending infinera tests
-- test with Slice NBI
-- integrate Slice NBI in Load Gen
-- sort endpoints in service and slice as done for links
-
-ONGOING:
-- implement mock IPM controller
-
-TO TEST:
-
-
-OPTIONAL:
-    - Optimize requests pathcomp--context
-    - Optimize requests webui--context
-    - TransportAPIDriver: add flag to import underlying topology options: 'disabled/devices/all'
-    - IetfL2VpnDriver: add flag to import underlying topology options: 'disabled/devices/all'
-    - MWDriver should import topology, there should be nothing between antennas
-    - Enable to create links (connectivity between subdevices)
-    - bidirectional links should be duplicated by frontend in a smart way