readme: Remove delimiter around example code
readme: Remove delimiter around example code

The delimiter was ugly and provided no additional layout cue since the
code was indented anyway.

Signed-off-by: Chad Versace <a557f7f75bf28dc19ac99107f5cc7cd6b3fbdb1a@linux.intel.com>

yinquan529/waffle-gl-waffle,waffle-gl/waffle,yinquan529/waffle-gl-waffle,chadversary/waffle,maurossi/waffle,evelikov/waffle,evelikov/waffle,fjhenigman/waffle,waffle-gl/waffle,maurossi/waffle,yinquan529/waffle-gl-waffle,janesma/waffle,evelikov/waffle,dcbaker/waffle,janesma/waffle,fjhenigman/waffle,chadversary/waffle,fjhenigman/waffle,dcbaker/waffle,waffle-gl/waffle,dcbaker/waffle,janesma/waffle,maurossi/waffle,chadversary/waffle,waffle-gl/waffle