Add canonicalization rewrite for useless cumsum/cumprod on length-1 axes#1904

alessandrogentili001 wants to merge 2 commits intopymc-devs:v2pymc-devs/pytensor:v2from

alessandrogentili001:rewrite-useless-cum-ops-1576alessandrogentili001/pytensor:rewrite-useless-cum-ops-1576Copy head branch name to clipboard