Fix incorrect characterization of dead-fn-elimination option

The dead functions should already be removed by the linker, so this option is only an improvement in compile times, not in binary size.

Thanks to @bjorn3 for raising this issue at https://rust-osdev.zulipchat.com/#narrow/channel/435142-newsletter/topic/Incorrect.20characterization.20of.20-Zdead-fn-elimination

Author: phil-opp

content/this-month/2026-05/index.md

@@ -75,7 +75,7 @@ In this section, we collect recent updates to `rustc`, `cargo`, and other toolin
 - [Promote five Thumb-mode bare-metal Arm targets to Tier 2](https://github.com/rust-lang/compiler-team/issues/985)
   - A compiler-team proposal entered final comment period to promote additional `thumb*-none-eabi*` bare-metal targets.
 - [Add `-Zdead-fn-elimination`](https://github.com/rust-lang/compiler-team/issues/976)
-  - A compiler-team proposal entered final comment period for a nightly codegen option that skips functions unreachable from exported symbols, which could help size-sensitive bare-metal and freestanding binaries.
+  - A compiler-team proposal entered final comment period for a nightly codegen option that skips functions unreachable from exported symbols, which could improve compile time. Improvements on binary size are [not expected](https://rust-osdev.zulipchat.com/#narrow/channel/435142-newsletter/topic/Incorrect.20characterization.20of.20-Zdead-fn-elimination) though since the linker should already eliminate dead functions today.
 
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