chore: Drop rust-analysis component

from the `rust-toolchain.toml` definition. This was added way back in
2021 via 8688569, and while I'm not sure what it expressed back then,
nowadays it refers to [Metadata for RLS][1], which apparently was an
early language server implementation and has long since been replaced by
*rust-analyzer*.

We don't want to propose or enforce the use of a specific toolchain and
in any case, setting this up properly is the job of a developers
IDE/Editor.

[1]:
https://github.com/rust-lang/rustup/blob/1f06e3b31d444f3649dd51225a9d38362f7313e0/doc/user-guide/src/concepts/components.md#previous-components

Author: har7an

rust-toolchain.toml

@@ -1,6 +1,6 @@
 # This file is updated by `update-toolchain.sh`
 [toolchain]
 # NOTE: When updating this, modify `rust-version` in `Cargo.toml` accordingly
-components = ["rustfmt", "clippy", "rust-analysis"]
 channel = "1.84.0"
+components = ["rustfmt", "clippy"]
 targets = ["wasm32-wasip1", "x86_64-unknown-linux-musl"]