C++17: Old Function Adapters Removed

C++17 removed the following binder and adaptor functions.

unary_function
binary_function
binder1st
binder2nd
bind1st
bind2nd
pointer_to_unary_function
pointer_to_binary_function
ptr_fun
mem_fun_t
mem_fun1_t
const_mem_fun_t
const_mem_fun1_t
mem_fun
mem_fun_ref_t
mem_fun1_ref_t
const_mem_fun_ref_t
const_mem_fun1_ref_t
mem_fun_ref

References:
https://en.wikipedia.org/wiki/C%2B%2B17
http://en.cppreference.com/w/cpp/utility/functional