Revert "Auto merge of #83770 - the8472:tra-extend, r=Mark-Simulacrum"
Due to a performance regression that didn't show up in the original perf run
this reverts commit 9111b8ae9793f18179a1336417618fc07a9cac85 (#83770), reversing
changes made to 9a700d2947f2d7f97a2c0dfca3117a8dcc255bdd.
Since since is expected to have the inverse impact it should probably be rollup=never.
r? `@Mark-Simulacrum`