eliminate GenericMemory-specific length method

Author: nsajko

base/essentials.jl

@@ -9,7 +9,7 @@ const Bottom = Union{}
 # Define minimal array interface here to help code used in macros:
 size(a::Array) = getfield(a, :size)
 length(t::AbstractArray) = (@inline; prod(size(t)))
-length(a::GenericMemory) = getfield(a, :length)
+size(a::GenericMemory) = (getfield(a, :length),)
 throw_boundserror(A, I) = (@noinline; throw(BoundsError(A, I)))
 
 # multidimensional getindex will be defined later on

base/genericmemory.jl

@@ -61,8 +61,6 @@ AtomicMemory
 
 using Core: memoryrefoffset, memoryref_isassigned # import more functions which were not essential
 
-size(a::GenericMemory) = (length(a),)
-
 IndexStyle(::Type{<:GenericMemory}) = IndexLinear()
 
 parent(ref::GenericMemoryRef) = ref.mem