remove unused methods

Author: bicycle1885

src/io.jl

@@ -27,15 +27,3 @@ function unsafe_read(input::IO, output::Ptr{UInt8}, nbytes::Int)::Int
     nread += n
     return nread
 end
-
-function unsafe_read(input::IO, mem::Memory)
-    return unsafe_read(input, mem.ptr, Int(mem.size))
-end
-
-function unsafe_write(output::IO, ptr::Ptr{UInt8}, nbytes::Int)::Int
-    return Base.unsafe_write(output, ptr, nbytes)
-end
-
-function unsafe_write(output::IO, mem::Memory)
-    return Base.unsafe_write(output, mem.ptr, mem.size)
-end