Remove start/next/done remnants

Author: mbauman

base/essentials.jl

@@ -690,43 +690,6 @@ function invokelatest(@nospecialize(f), @nospecialize args...; kwargs...)
     Core._apply_latest(inner)
 end
 
-# iteration protocol
-
-"""
-    next(iter, state) -> item, state
-
-For a given iterable object and iteration state, return the current item and the next iteration state.
-
-# Examples
-```jldoctest
-julia> next(1:5, 3)
-(3, 4)
-
-julia> next(1:5, 5)
-(5, 6)
-```
-"""
-function next end
-
-"""
-    start(iter) -> state
-
-Get initial iteration state for an iterable object.
-
-# Examples
-```jldoctest
-julia> start(1:5)
-1
-
-julia> start([1;2;3])
-1
-
-julia> start([4;2;3])
-1
-```
-"""
-function start end
-
 """
     isempty(collection) -> Bool
 

base/exports.jl

@@ -618,9 +618,6 @@ export
     set_zero_subnormals,
 
 # iteration
-    done,
-    next,
-    start,
     iterate,
 
     enumerate,  # re-exported from Iterators

contrib/precompile_explicit.jl

@@ -474,7 +474,6 @@ precompile(Tuple{typeof(Base.similar), Type{Array{Method, N} where N}, Tuple{Bas
 precompile(Tuple{typeof(Base.sizeof), String})
 precompile(Tuple{typeof(Base.skip_deleted_floor!), Base.Dict{Symbol, Any}})
 precompile(Tuple{typeof(Base.sort!), Array{Int64, 1}, Base.Sort.QuickSortAlg, Base.Order.Perm{Base.Order.ForwardOrdering, Array{Tuple{Float64, Int64}, 1}}})
-precompile(Tuple{typeof(Base.start), Nothing})
 precompile(Tuple{typeof(Base.startswith), Base.SubString{String}, String})
 precompile(Tuple{typeof(Base.startswith), String, Char})
 precompile(Tuple{typeof(Base.stream_wait), Base.Timer, Base.Condition})