PLT-6596: Elasticsearch interface changes. (#6993)

einterfaces/elasticsearch.go

@@ -9,7 +9,7 @@ type ElasticsearchInterface interface {
 	Start() *model.AppError
 	IndexPost(post *model.Post, teamId string) *model.AppError
 	SearchPosts(channels *model.ChannelList, searchParams []*model.SearchParams) ([]string, *model.AppError)
-	DeletePost(postId string) *model.AppError
+	DeletePost(post *model.Post) *model.AppError
 	TestConfig(cfg *model.Config) *model.AppError
 	PurgeIndexes() *model.AppError
 }