[perl #131254] Useless use warning from infix macro

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# New Ticket Created by  Benjamin Goldberg 
# Please include the string:  [perl #131254]
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# <URL: https://rt.perl.org/Ticket/Display.html?id=131254 >


<BenGoldberg> m: use experimental :macros; macro infix:<plus>($a, $b) { return 
quasi { {{{$a}}} + {{{$b}}} } }; say 2 plus 3;
<+camelia> rakudo-moar f4cbdb: OUTPUT: «WARNINGS for <tmp>:␤Useless use of 
constant integer 2 in sink context (line 1)␤Useless use of constant integer 3 
in sink context (line 1)␤5␤»