Remove no-longer-needed MiraclePtr clang plugin options

`raw-ref-template-as-trivial-member` and `raw-span-template-as-trivial-member`
are no-ops at this point–they are always enabled–so clean up the options and
the GN configuration.

Bug: 394919686
Change-Id: I42942277b927e69241369aea642dd73f2cb491a3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6803274
Reviewed-by: Nico Weber <[email protected]>
Commit-Queue: Daniel Cheng <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1494931}
NOKEYCHECK=True
GitOrigin-RevId: ff19affe86bd659a008c0aa8aae6f9fb4709fdb9
2 files changed