Auto merge of #131368 - GuillaumeGomez:rustdoc-dead-code, r=notriddle

[rustdoc] Remove intra-doc links dead code

While working on rust-lang/rust#130278, I wondered what `resolve_display_text` was doing. I removed it and ran all rustdoc tests, and nothing failed. Are some intra-doc links tests missing or is it really dead code? Couldn't figure it out.

r? `@notriddle`

Author: bors