[ELF] Delete --no-cref which does not exist in GNU ld
authorFangrui Song <i@maskray.me>
Sun, 20 Jun 2021 21:28:56 +0000 (14:28 -0700)
committerFangrui Song <i@maskray.me>
Sun, 20 Jun 2021 21:28:56 +0000 (14:28 -0700)
commit89e66a3ab3b2958285842ed3705b2264c0f67473
tree54edd777791a38298661ee81d02c23fdc1af601d
parentcd6b1b2b865a2c13b5b77939375afbc29a12cdb6
[ELF] Delete --no-cref which does not exist in GNU ld

Also delete the single dash form which does not appear to be used.
lld/ELF/Driver.cpp
lld/ELF/Options.td
lld/test/ELF/cref.s
lld/test/ELF/just-symbols-cref.s