remove FIOCLEX and FIONBIO which were shadowing a bsd-wide declaration

Author: alecmocatta

src/unix/bsd/apple/mod.rs

@@ -1085,10 +1085,8 @@ pub const TIOCPTYGRANT: ::c_uint = 0x20007454;
 pub const TIOCPTYGNAME: ::c_uint = 0x40807453;
 pub const TIOCPTYUNLK: ::c_uint = 0x20007452;
 
-pub const FIOCLEX: ::c_uint = 0x20006601;
 pub const FIONCLEX: ::c_uint = 0x20006602;
 pub const FIONREAD: ::c_ulong = 0x4004667f;
-pub const FIONBIO: ::c_ulong = 0x8004667e;
 pub const FIOASYNC: ::c_ulong = 0x8004667d;
 pub const FIOSETOWN: ::c_ulong = 0x8004667c;
 pub const FIOGETOWN: ::c_ulong = 0x4004667b;