Remove custom filter for [auctioneer][data][lrps] from logstash
Remove custom filter for [auctioneer][data][lrps] from logstash

Previously the value of lrps was a hash where the keys were the job ids which caused Elasticseearch to create unnecessary mappings [1].
Since then the upstream code changed and lrps now contains a list of the jobs therefore this filter is not necessary anymore.

New format:
```
"lrps":[{"guid":"8bf3211b-aac2-4f54-a051-5b2302014f34-3a25f826-fc4e-404e-b9b7-4cfbc8029e35","indices":[0]}]
```

[1] https://github.com/alphagov/paas-cf/commit/2af78d7453080829e895b7fead7174c5b8b06855

alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf