core_unload: Unload (delete) a core
In solrium: General Purpose R Interface to 'Solr'

Unload (delete) a core

core_unload(
  conn,
  name,
  deleteIndex = FALSE,
  deleteDataDir = FALSE,
  deleteInstanceDir = FALSE,
  async = NULL,
  raw = FALSE,
  callopts = list()
)

`conn`	A solrium connection object, see SolrClient
`name`	(character) The name of the core to be created. Required
`deleteIndex`	(logical) If `TRUE`, will remove the index when unloading the core. Default: `FALSE`
`deleteDataDir`	(logical) If `TRUE`, removes the data directory and all sub-directories. Default: `FALSE`
`deleteInstanceDir`	(logical) If `TRUE`, removes everything related to the core, including the index directory, configuration files and other related files. Default: `FALSE`
`async`	(character) Request ID to track this action which will be processed asynchronously
`raw`	(logical) If `TRUE`, returns raw data
`callopts`	curl options passed on to crul::HttpClient

## Not run: 
# start Solr with Schemaless mode via the schemaless eg:
#   bin/solr start -e schemaless

# connect
(conn <- SolrClient$new())

# Create a core
conn$core_create(name = "books")

# Unload a core
conn$core_unload(name = "books")
## not found
# conn$core_unload(name = "books")
# > Error: 400 - Cannot unload non-existent core [books]

## End(Not run)