[Bug driver/114330] needs_preprocessing field of struct compiler is unused

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114330

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
[apinski@xeond2 gcc]$ git grep needs_preprocessing
gcc.cc:  int needs_preprocessing;       /* If nonzero, source files need to
lto/lang-specs.h:   /*cpp_spec=*/NULL, /*combinable=*/1,
/*needs_preprocessing=*/0},

That is the only references that grep could find even for needs_preprocessing.