[clang] [clang][NFC] Clean up ASTContext.cpp (PR #140847)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `publish-sphinx-docs` running on `as-worker-4` while building `clang` at step 6 "Publish docs-llvm-html".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/45/builds/12439

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (Publish docs-llvm-html) failure: 'rsync -vrl ...' (failure)
ssh: connect to host lists.llvm.org port 22: Connection timed out
rsync: connection unexpectedly closed (0 bytes received so far) [sender]
rsync error: unexplained error (code 255) at io.c(235) [sender=3.1.3]
Step 7 (Publish docs-clang-html) failure: 'rsync -vrl ...' (failure)
ssh: connect to host lists.llvm.org port 22: Connection timed out
rsync: connection unexpectedly closed (0 bytes received so far) [sender]
rsync error: unexplained error (code 255) at io.c(235) [sender=3.1.3]

```

</details>

https://github.com/llvm/llvm-project/pull/140847