chore: delete old examples

[ninoseki]

Delete examples which use deprecated/deleted methods(ref. #530)

[coveralls]

Coverage remained the same at 37.684% when pulling 2c491b2 on ninoseki:remove-old-samples into db9c54b on MISP:master.

[codecov]

Codecov Report

Merging #531 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #531   +/-   ##
=======================================
  Coverage   37.75%   37.75%           
=======================================
  Files          35       35           
  Lines        7062     7062           
=======================================
  Hits         2666     2666           
  Misses       4396     4396

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[Rafiot]

Thanks!