[bootlin/training-materials] 8fe2a5: labs/sysdev-toolchains: remove "Known issues"

[Thomas Petazzoni]

  Branch: refs/heads/master
  Home:   https://github.com/bootlin/training-materials
  Commit: 8fe2a522457c22182f5f4927d968a36e6ac6162f
      https://github.com/bootlin/training-materials/commit/8fe2a522457c22182f5f4927d968a36e6ac6162f
  Author: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
  Date:   2022-09-22 (Thu, 22 Sep 2022)

  Changed paths:
    M labs/sysdev-toolchain/sysdev-toolchain.tex

  Log Message:
  -----------
  labs/sysdev-toolchains: remove "Known issues"

Drop this part: in recent times, we haven't seen many download
issues. In addition, the tarballs are no longer in $HOME/src, but in
.build/tarballs/, which even further shows that this hasn't been used
in a while.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>