word-lib: remove unused if/option lemma
Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
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@ -441,10 +441,6 @@ lemma sum_map_simps[simp]:
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"sum_map f g (Inr w) = Inr (g w)"
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"sum_map f g (Inr w) = Inr (g w)"
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by (simp add: sum_map_def)+
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by (simp add: sum_map_def)+
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lemma if_Some_None_eq_None:
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"((if P then Some v else None) = None) = (\<not> P)"
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by simp
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lemma CollectPairFalse [iff]:
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lemma CollectPairFalse [iff]:
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"{(a,b). False} = {}"
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"{(a,b). False} = {}"
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by (simp add: split_def)
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by (simp add: split_def)
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