Remove migrated fullchain file (#157)

Author: james-toussaint

CHANGELOG.md

@@ -3,7 +3,7 @@
 ## vNEXT
 
 - Migrate integration test files to Typescript & Hardhat:
-    - 000_fullchain.js (#155)
+    - 000_fullchain.js (#156, #157)
 - Remove `smock` from unit tests:
     - IexecEscrow.v8 (#154, #155)
     - IexecPocoDelegate (#149, #151)