Remove TODO comments

.github/workflows/update_submodules.yml

@@ -10,13 +10,6 @@ on: [push]
 #  schedule:
 #    - cron: '17 8 10 * *' # Run monthly on the 10th, at 8:17am
 
-# TODO:
-# 1. Checkout then create a branch like submodules-update-<timestamp>
-# 2. Run `git submodule update --remote --merge` to update all git submodules (https://stackoverflow.com/questions/8191299/update-a-submodule-to-the-latest-commit/42175412#42175412)
-# 3. Commit results
-# 4. Push branch
-# 5. Open PR
-
 jobs:
   update:
     runs-on: ubuntu-latest