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[Merged by Bors] - perf: remove @[simp] on Fintype.card_of{IsEmpty,Subsingleton} #20524

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[Merged by Bors] - perf: remove @[simp] on Fintype.card_of{IsEmpty,Subsingleton} #20524

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2 changes: 0 additions & 2 deletions Mathlib/Data/Fintype/Card.lean
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Original file line number Diff line number Diff line change
Expand Up @@ -194,7 +194,6 @@ theorem card_eq {α β} [_F : Fintype α] [_G : Fintype β] : card α = card β
/-- Note: this lemma is specifically about `Fintype.ofSubsingleton`. For a statement about
arbitrary `Fintype` instances, use either `Fintype.card_le_one_iff_subsingleton` or
`Fintype.card_unique`. -/
@[simp]
theorem card_ofSubsingleton (a : α) [Subsingleton α] : @Fintype.card _ (ofSubsingleton a) = 1 :=
rfl

Expand All @@ -204,7 +203,6 @@ theorem card_unique [Unique α] [h : Fintype α] : Fintype.card α = 1 :=

/-- Note: this lemma is specifically about `Fintype.ofIsEmpty`. For a statement about
arbitrary `Fintype` instances, use `Fintype.card_eq_zero`. -/
@[simp]
theorem card_ofIsEmpty [IsEmpty α] : @Fintype.card α Fintype.ofIsEmpty = 0 :=
rfl

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