Remove some uneeded code in CommonSubexprEliminate
#3730
Merged
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Draft as it builds on #3726 from @alex-natzkaWhich issue does this PR close?
re #3635
Rationale for this change
The type of expressions should be determined by the schema of the input, not the schema of the node itself
What changes are included in this PR?
Remove uneeded (and incorrect) fallback
Are there any user-facing changes?
no
cc @waynexia