remove type piracy on eltype etc

Author: oxinabox

src/sorted_dict.jl

@@ -308,16 +308,14 @@ Returns the key type for SortedDict, SortedMultiDict and SortedSet.
 This function may also be applied to the type itself. Time: O(1)
 """
 @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
 
 """
     valtype(sc)
 
 Returns the value type for SortedDict and SortedMultiDict. This
 function may also be applied to the type itself. Time: O(1)
 """
-@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
 
 """
     ordtype(sc)

src/sorted_set.jl

@@ -174,14 +174,6 @@ end
     return exactfound
 end
 
-"""
-    eltype(sc)
-
-Returns the key type for SortedSet.
-This function may also be applied to the type itself. Time: O(1)
-"""
-@inline Base.eltype(::Type{SortedSet{K,Ord}}) where {K,Ord <: Ordering} = K
-
 """
     keytype(sc)