remove stale broadcasted_indices:

- referenced non-extant `indices`
- `broadcasted_indices` was deprecated to `broadcasted_axes` in JuliaLang/julia#25377
- `broadcasted_axes` was then replaced by plain `axes` JuliaLang/julia@a2feccf
- StaticArrays already has `axes` methods

Author: thchr

src/broadcast.jl

@@ -49,8 +49,6 @@ _bcs1(a::Base.OneTo, b::SOneTo) = _bcs1(a, Base.OneTo(b))
 ## Internal broadcast machinery for StaticArrays ##
 ###################################################
 
-broadcast_indices(A::StaticArray) = indices(A)
-
 # TODO: just use map(broadcast_size, as)?
 @inline broadcast_sizes(a, as...) = (broadcast_size(a), broadcast_sizes(as...)...)
 @inline broadcast_sizes() = ()