Revert "updated: fix surfacing exceptions and errors (#20754)"

This reverts commit 3c9e46d8a2.

selfdrive/updated.py

@@ -281,17 +281,12 @@ def check_git_fetch_result(fetch_txt):
 
 def check_for_update() -> Tuple[bool, bool]:
   setup_git_options(OVERLAY_MERGED)
-  fetch_output = None
   try:
-    fetch_output = run(["git", "fetch", "--dry-run"], OVERLAY_MERGED, low_priority=True)
-    return True, check_git_fetch_result(fetch_output)
+    git_fetch_output = run(["git", "fetch", "--dry-run"], OVERLAY_MERGED, low_priority=True)
+    return True, check_git_fetch_result(git_fetch_output)
   except subprocess.CalledProcessError:
-    # check for internet
-    if fetch_output is not None and fetch_output.startswith("fatal: unable to access") and \
-       "Could not resolve host:" in str(fetch_output):
-      return False, False
+    return False, False
 
-    raise
 
 def fetch_update(wait_helper: WaitTimeHelper) -> bool:
   cloudlog.info("attempting git fetch inside staging overlay")