Kill of unused data (#149)

`grep -Fr data.kroxylicious | grep -Fv '.latestRelease'` shows now hits,
so we know the `versions` property is now unused.
Let's remove it to avoid future confusion.

Signed-off-by: Tom Bentley <[email protected]>

Author: tombentley

_data/kroxylicious.yml

@@ -1,48 +1,3 @@
 # The version number of the latest release
 latestRelease: 0.13.0
 
-# The versions property is used for the old-style /docs paths
-versions:
-  - title: 'Development'
-    url: '/kroxylicious'
-  - title: 'v0.13.0'
-    url: '/docs/v0.13.0/'
-    subsections:
-      - title: 'Proxy Guide'
-        url: '/docs/v0.13.0/kroxylicious-proxy/'
-      - title: 'Operator Guide'
-        url: '/docs/v0.13.0/kroxylicious-operator/'
-      - title: 'Developer Guide'
-        url: '/docs/v0.13.0/developer-guide/'
-      - title: 'Record Encryption Guide'
-        url: '/docs/v0.13.0/record-encryption-guide/'
-  - title: 'v0.12.0'
-    url: '/docs/v0.12.0/'
-    subsections:
-      - title: 'Proxy Guide'
-        url: '/docs/v0.12.0/kroxylicious-proxy/'
-  - title: 'v0.11.0'
-    url: '/docs/v0.11.0/'
-    subsections:
-      - title: 'Proxy Guide'
-        url: '/docs/v0.11.0/kroxylicious-proxy/'
-  - title: 'v0.10.0'
-    url: '/docs/v0.10.0/'
-  - title: 'v0.9.0'
-    url: '/docs/v0.9.0/'
-  - title: 'v0.8.0'
-    url: '/docs/v0.8.0/'
-  - title: 'v0.7.0'
-    url: '/docs/v0.7.0/'
-  - title: 'v0.6.0'
-    url: '/docs/v0.6.0/'
-  - title: 'v0.5.1'
-    url: '/docs/v0.5.1/'
-  - title: 'v0.5.0'
-    url: '/docs/v0.5.0/'
-  - title: 'v0.4.1'
-    url: '/docs/v0.4.1/'
-  - title: 'v0.4.0'
-    url: '/docs/v0.4.0/'
-  - title: 'v0.3.0'
-    url: '/docs/v0.3.0/'