chore: rm outdated/refactored files

%5BTA%2Fdev%5DWhy-are-we-using-%60gitea.com%2FBoYanZh%2Fcheckout%60%3F-%5BDEPRECATED%5D.md

@@ -1,5 +0,0 @@
-1. `act_runner` only supports URL with format `${host}/${owner}/${name}`, `${host}/git/${owner}/${name}` does not work. So we can not use self-hosted checkout. Check [here](https://gitea.com/gitea/act/src/commit/165620676543e66a1fcfda6520c65bea3be51ede/pkg/runner/step_action_remote.go#L307).
-2. By default, `actions/checkout` also only supports URL with format `${host}/${owner}/${name}`. Check [here](https://gitea.com/actions/checkout/src/commit/85e6279cec87321a52edac9c87bce653a07cf6c2/src/url-helper.ts#L19).
-3. `gitea.com/BoYanZh/checkout` is modified, which hardcodes ssh port and our URL format to clone the repo in `act_runner`. Check [here](https://gitea.com/BoYanZh/checkout/src/commit/4c8f4bdc40a644db67b4468842e454e439891c72/src/url-helper.ts#L19).
-
-On joj-dev server, we use 0.2.11-focs act_runner, which comes from https://github.com/focs-gitea/act_runner/tree/v0.2.11-focs. It supports `${host}/git/${owner}/${name}`, so we can just use `actions/checkout@focs` now and it will use https://focs.ji.sjtu.edu.cn/git/actions/checkout/src/branch/focs.

%5BTA%5DUse-Git-LFS-in-Gitea-Actions.md

@@ -1,33 +0,0 @@
-bug: https://github.com/actions/checkout/issues/1830#issuecomment-2314758792
-
-solution: checkout lfs object separately 
-
-```yaml
-name: Run JOJ3 on Push
-on: [push]
-
-jobs:
-  run:
-    runs-on: focs-ubuntu-latest-slim
-    container:
-      volumes:
-        - /home/tt/.config:/home/tt/.config
-        - /home/tt/.cache:/home/tt/.cache
-        - /home/tt/.ssh:/home/tt/.ssh
-    steps:
-      - name: Check out repository code
-        uses: actions/checkout@focs
-        with:
-          lfs: false
-          persist-credentials: 'true'
-      - name: Checkout lfs
-        run: |
-          git lfs install --local
-          AUTH=$(git config --local http.https://focs.ji.sjtu.edu.cn/.extraheader)
-          git config --local --unset http.https://focs.ji.sjtu.edu.cn/.extraheader
-          git config --local http.${{ gitea.server_url }}/${{ gitea.repository }}.git/info/lfs/objects/batch.extraheader "$AUTH"
-          git lfs pull
-      - name: run joj3
-        run: |
-          sudo -E -u tt joj3 -conf-root /home/tt/.config/joj
-```

%5BTA%5DWhat-you-need-to-know-before-using-MemorySanitizer-%28MSan%29-in-C%2B%2B.md

@@ -1,3 +0,0 @@
-According to our current observation, MemorySanitizer with `iostream` linked with uninstrumented libc++ will not work. Not sure about other libraries/headers.
-
-Explanation: https://github.com/google/sanitizers/wiki/MemorySanitizerLibcxxHowTo