Remove deprecated config `skip_event`
`skip-event` has been removed as of [HTTP Check release 2.0.0](https://github.com/DataDog/integrations-core/blob/f8b9b133af66d26599d623367eccff6fdb3e56af/http_check/CHANGELOG.md#200--2018-03-23).
MODIFY
recipes/http_check.rb
recipes/http_check.rb
@@ -11,7 +11,6 @@ include_recipe 'datadog::dd-agent'
# 'content_match' => 'string to match',
# 'include_content' => true,
# 'collect_response_time' => true,
-# 'skip_event' => true,
# 'tags' => [
# 'myApp',
# 'serviceName'

Remove deprecated config `skip_event` (#769)

`skip-event` has been removed as of [HTTP Check release 2.0.0](https://github.com/DataDog/integrations-core/blob/f8b9b133af66d26599d623367eccff6fdb3e56af/http_check/CHANGELOG.md#200--2018-03-23).