Remove `./mach cargo`.
Remove `./mach cargo`.

Not all cargo subcommands take `--manifest-path`.
Use plain `cargo` instead (rustup reads the `rust-toolchain` file)
or consider adding new mach sub-commands.

notriddle/servo,saneyuki/servo,nnethercote/servo,paulrouget/servo,saneyuki/servo,larsbergstrom/servo,KiChjang/servo,paulrouget/servo,notriddle/servo,larsbergstrom/servo,notriddle/servo,nnethercote/servo,splav/servo,KiChjang/servo,KiChjang/servo,paulrouget/servo,larsbergstrom/servo,KiChjang/servo,saneyuki/servo,DominoTree/servo,nnethercote/servo,saneyuki/servo,KiChjang/servo,nnethercote/servo,paulrouget/servo,DominoTree/servo,notriddle/servo,larsbergstrom/servo,DominoTree/servo,nnethercote/servo,splav/servo,splav/servo,DominoTree/servo,paulrouget/servo,KiChjang/servo,paulrouget/servo,splav/servo,larsbergstrom/servo,paulrouget/servo,KiChjang/servo,notriddle/servo,paulrouget/servo,DominoTree/servo,notriddle/servo,notriddle/servo,splav/servo,saneyuki/servo,larsbergstrom/servo,larsbergstrom/servo,KiChjang/servo,notriddle/servo,splav/servo,notriddle/servo,saneyuki/servo,nnethercote/servo,nnethercote/servo,nnethercote/servo,nnethercote/servo,larsbergstrom/servo,paulrouget/servo,saneyuki/servo,nnethercote/servo,KiChjang/servo,splav/servo,DominoTree/servo,saneyuki/servo,DominoTree/servo,splav/servo,larsbergstrom/servo,KiChjang/servo,splav/servo,larsbergstrom/servo,DominoTree/servo,notriddle/servo,paulrouget/servo,saneyuki/servo,DominoTree/servo,saneyuki/servo,splav/servo,DominoTree/servo