Revert "fix hash, findfirst"

This reverts commit 281959a.

Author: Michael Abbott

src/functions.jl

@@ -206,11 +206,6 @@ end
 Base.filter(f, A::KeyedVector) = getindex(A, map(f, parent(A)))
 Base.filter(f, A::KeyedArray) = filter(f, parent(A))
 
-# These would otherwise call keys(A), which perhaps it would be better to allow:
-Base.hash(A::KeyedArray) = hash((parent(A), axiskeys(A)...))
-Base.findfirst(f::Function, A::KeyedArray) = findfirst(f, parent(A))
-Base.findlast(f::Function, A::KeyedArray) = findlast(f, parent(A))
-
 using LinearAlgebra
 
 for (mod, fun, lazy) in [(Base, :permutedims, false),

test/_functions.jl

@@ -233,11 +233,3 @@ end
     @test M ≈ MN
 
 end
-@testset "hash & find" begin
-
-    @test hash(M) != hash(parent(M))
-
-    findfirst(x->x>50, V) == findfirst(x->x>50, parent(V))
-    findlast(x->x<=50, V) == findlast(x->x<=50, parent(V))
-
-end