remove eltype definition from SortedDict and SortedSet (#863)

* remove eltype piracy from SortedDict

* Update sorted_dict.jl

* Remove eltype on SortedSet

---------

Co-authored-by: Jameson Nash <[email protected]>

Author: andyferris

src/sorted_dict.jl

@@ -231,11 +231,8 @@ end
 
 
 @inline Base.eltype(m::SortedDict{K,D,Ord}) where {K,D,Ord <: Ordering} =  Pair{K,D}
-@inline Base.eltype(::Type{SortedDict{K,D,Ord}}) where {K,D,Ord <: Ordering} =  Pair{K,D}
 @inline Base.keytype(m::SortedDict{K,D,Ord}) where {K,D,Ord <: Ordering} = K
-@inline Base.keytype(::Type{SortedDict{K,D,Ord}}) where {K,D,Ord <: Ordering} = K
 @inline Base.valtype(m::SortedDict{K,D,Ord}) where {K,D,Ord <: Ordering} = D
-@inline Base.valtype(::Type{SortedDict{K,D,Ord}}) where {K,D,Ord <: Ordering} = D
 
 """
     Base.in(p::Pair, sd::SortedDict)

src/sorted_set.jl

@@ -164,7 +164,6 @@ convertible to `eltype(m)`.  Time: O(*c* log *n*)
     return exactfound
 end
 
-@inline Base.eltype(::Type{SortedSet{K,Ord}}) where {K,Ord <: Ordering} = K
 @inline Base.keytype(m::SortedSet{K,Ord}) where {K,Ord <: Ordering} = K
 @inline Base.keytype(::Type{SortedSet{K,Ord}}) where {K,Ord <: Ordering} = K