update release process for rust-lang/rust#79133

Author: pietroalbini

Diff for: src/release/process.md

@@ -89,8 +89,6 @@ branch of rust-lang/rust which:
   - Change `date` to "YYYY-MM-DD" where the date is the archive date the stable
     build was uploaded
   - Change `rustc` to "X.Y.Z" where that's the version of rustc you just build
-  - Change `cargo` to "A.B.C" where it's Cargo's version. That's typically
-    "0.(Y+1).0" wrt the rustc version.
   - Comment `rustfmt: nightly-YYYY-MM-DD`
   - Uncomment `dev: 1`
 - Update src/ci/run.sh to pass "--release-channel=beta".