delete redundant IteratorSize method for Slices

[nsajko]

Already covered as an AbstractArray subtype.

[nsajko]

Rebased, hoping CI is healthier now.

[nsajko]

Bump? I confirm this doesn't cause any invalidation when running my usual workload (which defines a subtype of Integer and a subtype of AbstractString, both with some methods for existing functions).

[nsajko]

These are the relevant type definitions, in case it helps review:

julia/base/slicearray.jl

Line 9 in 772745b

abstract type AbstractSlices{T,N} <: AbstractArray{T,N} end

julia/base/slicearray.jl

Line 22 in 772745b

struct Slices{P,SM,AX,S,N} <: AbstractSlices{S,N}

And the IteratorSize method for AbstractArray:

julia/base/generator.jl

Line 100 in 772745b

IteratorSize(::Type{<:AbstractArray{<:Any,N}}) where {N} = HasShape{N}()

[nsajko]

bump