[bootlin/training-materials] 32b302: yocto: slides: remove reference to meta-gplv2

[Luca Ceresoli]

  Branch: refs/heads/master
  Home:   https://github.com/bootlin/training-materials
  Commit: 32b302c1449a78becee5092e4dd69da2e9af1f86
      https://github.com/bootlin/training-materials/commit/32b302c1449a78becee5092e4dd69da2e9af1f86
  Author: Luca Ceresoli <luca.ceresoli at bootlin.com>
  Date:   2022-09-15 (Thu, 15 Sep 2022)

  Changed paths:
    M slides/yocto-licensing/yocto-licensing.tex

  Log Message:
  -----------
  yocto: slides: remove reference to meta-gplv2

It won't be missed.

Signed-off-by: Luca Ceresoli <luca.ceresoli at bootlin.com>