Remove per-notebook timeout check

This is now handled by noteburst when we set the notebook execution
timeout in the execution request. This is a better approach because we
don't actually see the in_progress state for a notebook execution
(again, because arq doesn't expose that to the job metadata, only to the
job result it seems(?)

src/timessquare/services/githubcheckrun.py

@@ -4,7 +4,6 @@
 
 import asyncio
 from collections import deque
-from datetime import timedelta
 
 from gidgethub.httpx import GitHubAPI
 from httpx import AsyncClient
@@ -283,29 +282,6 @@ async def _poll_noteburst_results(
                 check.report_noteburst_completion(
                     page_execution=page_execution, job_result=job
                 )
-            elif (
-                job.status == NoteburstJobStatus.in_progress
-                and job.runtime
-                > timedelta(
-                    config.github_checkrun_timeout
-                )  # less than job timeout
-            ):
-                # If the job is in progress but has exceeded the timeout,
-                # report a timeout error.
-                # Because of peculiarity with arq, noteburst doesn't seem to
-                # indicate that a job is in progress, so this condition
-                # may not be triggered. Instead, a global timeout is needed
-                # for all jobs, which unfortunately is less granular because
-                # it may penalize repos with lots of notebooks, where the
-                # individual notebooks still execute in a reasonable time.
-                self._logger.debug(
-                    "Noteburst job is in progress but exeeding timeout",
-                    path=page_execution.page.repository_source_path,
-                    runtime=job.runtime.total_seconds(),
-                )
-                check.report_noteburst_timeout(
-                    page_execution=page_execution, job_result=job
-                )
             else:
                 pending_pages.append(page_execution)
                 self._logger.debug(