[docs] Remove outdated status update for FreeBSD

[brad]

Summary

Remove the really out of date status update for FreeBSD. FreeBSD with 13 already uses LLD as the system linker for all archs. OpenBSD nowadays does as well. I know for the OpenBSD ports tree we're well past 99.999% of our ports tree building with LLD on amd64, i386, arm, aarch64, powerpc, powerpc64, and riscv64 with mips64 still to do.

[emaste]

LGTM - yes, this links to a 2016 status report and is not relevant to include here anymore.

[MaskRay]

LGTM.

lld/docs/index.rst

 progress (See :doc:`WebAssembly`).
 
 Features
 --------
 
 - LLD is a drop-in replacement for the GNU linkers that accepts the
   same command line arguments and linker scripts as GNU.
 
-  We are currently working closely with the FreeBSD project to make
-  LLD default system linker in future versions of the operating
-  system, so we are serious about addressing compatibility issues. As
-  of February 2017, LLD is able to link the entire FreeBSD/amd64 base
-  system including the kernel. With a few work-in-progress patches it
-  can link approximately 95% of the ports collection on AMD64. For the
-  details, see `FreeBSD quarterly status report
-  <https://www.freebsd.org/news/status/report-2016-10-2016-12.html#Using-LLVM%27s-LLD-Linker-as-FreeBSD%27s-System-Linker>`_.
-
 - LLD is very fast. When you link a large program on a multicore
   machine, you can expect that LLD runs more than twice as fast as the GNU
   gold linker. Your mileage may vary, though.
 
 - It supports various CPUs/ABIs including AArch64, AMDGPU, ARM, Hexagon, MIPS
   32/64 big/little-endian, PowerPC, PowerPC64, RISC-V, SPARC V9, x86-32 and
   x86-64. Among these, AArch64, ARM (>= v6), PowerPC, PowerPC64, x86-32 and
   x86-64 have production quality. MIPS seems decent too.