[Bug fortran/96255] [F2018] Implement optional type spec for index in DO CONCURRENT

[anlauf at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96255

--- Comment #23 from anlauf at gcc dot gnu.org ---
The testers reported:

https://gcc.gnu.org/pipermail/gcc-testresults/2025-November/862281.html

../../src-master/gcc/fortran/resolve.cc: In function ‘void
gfc_resolve_forall(gfc_code*, gfc_namespace*, int)’:
../../src-master/gcc/fortran/resolve.cc:12653:27: error: unused variable
‘outer_sym’ [-Werror=unused-variable]
12653 |               gfc_symbol *outer_sym;
      |                           ^~~~~~~~~

I think this declaration should/can be removed without side-effects.