Revert "Add false_allow_templates as a dynamic mapping option (#18825)"

CHANGELOG.md

@@ -7,7 +7,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Added
 - Expand fetch phase profiling to support inner hits and top hits aggregation phases  ([##18936](https://github.com/opensearch-project/OpenSearch/pull/18936))
 - Add temporal routing processors for time-based document routing ([#18920](https://github.com/opensearch-project/OpenSearch/issues/18920))
-- The dynamic mapping parameter supports false_allow_templates ([#18825](https://github.com/opensearch-project/OpenSearch/pull/18825))
 
 
 ### Changed

rest-api-spec/src/main/resources/rest-api-spec/test/indices.put_mapping/all_path_options.yml

@@ -190,34 +190,3 @@ setup:
 
   - match: {test_index1.mappings.dynamic:     strict_allow_templates}
   - match: {test_index1.mappings.properties.test1.type:     text}
-
----
-"post a mapping with setting dynamic to false_allow_templates":
-  - skip:
-      version: " - 3.2.99"
-      reason: "introduced in 3.3.0"
-  - do:
-      indices.put_mapping:
-        index: test_index1
-        body:
-          dynamic: false_allow_templates
-          dynamic_templates: [
-            {
-              strings: {
-                "match": "foo*",
-                "match_mapping_type": "string",
-                "mapping": {
-                  "type": "keyword"
-                }
-              }
-            }
-          ]
-          properties:
-            test1:
-              type: text
-
-  - do:
-      indices.get_mapping: {}
-
-  - match: {test_index1.mappings.dynamic:     false_allow_templates}
-  - match: {test_index1.mappings.properties.test1.type:     text}