Rollup merge of #74185 - pickfire:liballoc-iter-doc, r=jyn514
Rollup merge of #74185 - pickfire:liballoc-iter-doc, r=jyn514

Remove liballoc unneeded explicit link

aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust