[8.18] Remove unused EIS types (#5107) (#5123)

* Remove unused EIS types (#5107)

They were removed in PR 4212.

(cherry picked from commit dcfb0ff)

# Conflicts:
#	output/schema/schema.json
#	specification/inference/_types/CommonTypes.ts

* Fix merge

Author: pquentin

output/schema/schema.json

@@ -56,9 +56,6 @@
     "Dangling type 'indices._types:StringFielddata'",
     "Dangling type 'indices._types:StringFielddataFormat'",
     "Dangling type 'indices.stats:ShardFielddata'",
-    "Dangling type 'inference._types:EisServiceSettings'",
-    "Dangling type 'inference._types:EisServiceType'",
-    "Dangling type 'inference._types:EisTaskType'",
     "Dangling type 'ingest._types:PipelineFailure'",
     "Dangling type 'ml._types:CountFunction'",
     "Dangling type 'ml._types:DistinctCountFunction'",

output/schema/validation-errors.json

@@ -754,26 +754,6 @@ export class CohereTaskSettings {
   truncate?: CohereTruncateType
 }
 
-export class EisServiceSettings {
-  /**
-   * The name of the model to use for the inference task.
-   */
-  model_id: string
-  /**
-   * This setting helps to minimize the number of rate limit errors returned.
-   * By default, the `elastic` service sets the number of requests allowed per minute to `240` in case of `chat_completion`.
-   */
-  rate_limit?: RateLimitSetting
-}
-
-export enum EisTaskType {
-  chat_completion
-}
-
-export enum EisServiceType {
-  elastic
-}
-
 export class ElasticsearchServiceSettings {
   /**
    * Adaptive allocations configuration details.