[PATCH] gdb: Remove unused extra_lines variable

[Tom Tromey]

>>>>> Tsukasa OI via Gdb-patches <gdb-patches@sourceware.org> writes:

> Clang generates a warning if there is a variable that is set but not used
> otherwise ("-Wunused-but-set-variable").  On the default configuration, it
> causes a build failure (unless "--disable-werror" is specified).

> The only extra_lines use in arrange_linetable function is removed on the
> commit 558802e4d1c5dcbd0df7d2c6ef62a6deac247a2f
> ("gdb: change subfile::line_vector to an std::vector").  So, this variable
> should be removed to prevent a build failure.

Thanks, this is ok.

Tom