BUILD: fd: remove unused variable totlen in fd_write_frag_line()

Ilya reports in GH #1392 that clang 13 complains about totlen being
calculated and not used in fd_write_frag_line(), which is true. It's
a leftover of some older code.

(cherry picked from commit 87063a7da1ead9f4ddf048c2d1924f635dce28a9)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed