Remove references to removed examples

[pmacik]

Motivation

Follows up to #1034

Changes

This PR:

• Removes all references to the examples removed via Remove obsolete examples in favour of SBO docs #1034
• Fixes Examples in README.md mostly (all?) 404 #1042

Testing

[pedjak]

/lgtm
/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: pedjak

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[codecov]

Codecov Report

Merging #1044 (17f3d24) into master (c509e4e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1044   +/-   ##
=======================================
  Coverage   58.11%   58.11%           
=======================================
  Files          29       29           
  Lines        1645     1645           
=======================================
  Hits          956      956           
  Misses        563      563           
  Partials      126      126           

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