Deprecating request parameters in _analyze API

Remove params in indices.analyze.json
Fix REST changes

Closes #20246

docs/reference/migration/migrate_6_0/rest.asciidoc

@@ -10,4 +10,4 @@ has been removed in Elasticsearch 6.0.0.
 
 ==== Analyze API changes
 
-The deprecated request parameters and plain text in request body has been removed. Use JSON in request body.
+The deprecated request parameters and plain text in request body has been removed. Define parameters in request body.

rest-api-spec/src/main/resources/rest-api-spec/api/indices.analyze.json

@@ -12,22 +12,6 @@
         }
       },
       "params": {
-        "analyzer": {
-          "type" : "string",
-          "description" : "The name of the analyzer to use"
-        },
-        "char_filter": {
-          "type" : "list",
-          "description" : "A comma-separated list of character filters to use for the analysis"
-        },
-        "field": {
-          "type" : "string",
-          "description" : "Use the analyzer configured for this field (instead of passing the analyzer name)"
-        },
-        "filter": {
-          "type" : "list",
-          "description" : "A comma-separated list of filters to use for the analysis"
-        },
         "index": {
           "type" : "string",
           "description" : "The name of the index to scope the operation"
@@ -36,22 +20,6 @@
           "type" : "boolean",
           "description" : "With `true`, specify that a local shard should be used if available, with `false`, use a random shard (default: true)"
         },
-        "text": {
-          "type" : "list",
-          "description" : "The text on which the analysis should be performed (when request body is not used)"
-        },
-        "tokenizer": {
-          "type" : "string",
-          "description" : "The name of the tokenizer to use for the analysis"
-        },
-        "explain": {
-          "type" : "boolean",
-          "description" : "With `true`, outputs more advanced details. (default: false)"
-        },
-        "attributes": {
-          "type" : "list",
-          "description" : "A comma-separated list of token attributes to output, this parameter works only with `explain=true`"
-        },
         "format": {
           "type": "enum",
           "options" : ["detailed","text"],
@@ -61,7 +29,7 @@
       }
     },
     "body": {
-      "description" : "The text on which the analysis should be performed"
+      "description" : "Define analyzer/tokenizer parameters and the text on which the analysis should be performed"
     }
   }
 }