Remove spurious env params in examples

Author: hoodmane

01-hello/src/entry.py

@@ -2,5 +2,5 @@
 
 
 class Default(WorkerEntrypoint):
-    async def fetch(self, request, env):
+    async def fetch(self, request):
         return Response("Hello world!")

08-cron/src/entry.py

@@ -3,7 +3,7 @@
 
 class Default(WorkerEntrypoint):
     # runs based on "triggers" in wrangler config
-    async def scheduled(self, controller, env, ctx):
+    async def scheduled(self, controller):
         print("Scheduled task has been executed.")
 
     async def fetch(self):