fix: remove redundant inline asyncio imports in Python e2e tests

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: SteveSandersonMS

python/e2e/test_permissions.py

@@ -71,8 +71,6 @@ def on_permission_request(
     async def test_should_deny_tool_operations_by_default_when_no_handler_is_provided(
         self, ctx: E2ETestContext
     ):
-        import asyncio
-
         session = await ctx.client.create_session()
 
         denied_events = []
@@ -103,8 +101,6 @@ def on_event(event):
     async def test_should_deny_tool_operations_by_default_when_no_handler_is_provided_after_resume(
         self, ctx: E2ETestContext
     ):
-        import asyncio
-
         session1 = await ctx.client.create_session(
             {"on_permission_request": PermissionHandler.approve_all}
         )