minor: Remove dead code for casting dictionaries #6286
Merged
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Which issue does this PR close?
N/A
Rationale for this change
I noticed this while reviewing #6269 from @viirya
#3387 has been closed so there is no need for this workaround any longer
What changes are included in this PR?
remove workaround
Are these changes tested?
covered by existing tests
Are there any user-facing changes?