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We can revert the code changes of commit b5febc1d1 now, because commit 9a3ddeb51 installed a real solution for the difficulty that b5febc1d1 just dodged, namely that the planner might pick the wrong one of several index columns nominally containing the same value. It only matters which one we pick if we pick one that's not returnable, and that mistake is now foreclosed. Although both of the aforementioned commits were back-patched, I don't feel a need to take any risk by back-patching this one. The cases that it improves are very corner-ish. Discussion: https://postgr.es/m/3179992.1641150853@sss.pgh.pa.us