[Bug preprocessor/65128] remove "linux" and "unix" from preprocessor macros from cpp-5

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65128

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
bcc76966 (ghazi         2003-11-29 03:08:13 +0000  45)  builtin_define_std
("linux");                           \
bcc76966 (ghazi         2003-11-29 03:08:13 +0000  46)  builtin_define_std
("unix");                            \