tests/test-fuzz-targets.t

log: drop dead code to concatenate --line-range patterns and pats

It's disabled since 2e45bbd3db7b, and the current implementation is unlikely
to be reused.

#require clang-libfuzzer test-repo
  $ cd $TESTDIR/../contrib/fuzz
  $ make
Just run the fuzzer for five seconds to verify it works at all.
  $ ./bdiff -max_total_time 5