docs: correct the /transaction/material docs for metadata

docs/src/openapi-v1.yaml

@@ -1049,17 +1049,17 @@ paths:
           format: unsignedInteger or $hex
       - name: noMeta
         in: query
+        description: DEPRECATED! This is no longer supported
         schema:
           type: boolean
-          description: DEPRECATED! This is no longer supported
           default: false
       - name: metadata
         in: query
+        description: Specifies the format of the metadata to be returned. Accepted values are
+          'json', and 'scale'. 'json' being the decoded metadata, and 'scale' being the SCALE encoded metadata.
+          When `metadata` is not inputted, the `metadata` field will be absent.
         schema:
           type: string
-          description: Specifies the format of the metadata to be returned. Accepted values are
-            'json', and 'scale'. 'json' being the decoded metadata, and 'scale' being the SCALE encoded metadata.
-            When `metadata` is not inputted, the `metadata` field will be absent.
       responses:
         "200":
           description: successful operation
@@ -4236,9 +4236,7 @@ components:
             does not change `txVersion`.
         metadata:
           type: string
-          description: The chain's metadata. It's default return value is hex, but may be returned in
-            decoded json format.
-          format: hex
+          description: The chain's metadata. It will only be present when the metadata query param is used.
       description: >-
         Note: `chainName`, `specName`, and `specVersion` are used to define a type registry with a set
         of signed extensions and types. For Polkadot and Kusama, `chainName` is not used in defining

src/controllers/transaction/TransactionMaterialController.ts

@@ -26,8 +26,8 @@ export type MetadataOpts = 'json' | 'scale';
  * GET all the network information needed to construct a transaction offline.
  *
  * Query
- * - (Optional) `noMeta`: If true, does not return metadata hex. This is useful when metadata is not
- * 		needed and response time is a concern. Defaults to false.
+ * - (Optional) `metadata`: It accepts `json`, or `scale` values. If it is not present, the
+ *   the metadata field will not be included.
  * - (Optional) `at`: Block hash or number at which to query. If not provided, queries
  *   finalized head.
  *
@@ -79,14 +79,11 @@ export default class TransactionMaterialController extends AbstractController<Tr
 	/**
 	 * The metadata args have two options. `json`, and `scale`.
 	 *
-	 * @param noMeta
 	 * @param metadata
 	 */
 	private parseMetadataArgs(metadata: unknown): MetadataOpts | false {
 		/**
-		 * Checks to see if the `metadata` query param is inputted, if it isnt,
-		 * it will default to the old behavior. This is to be removed once after
-		 * the `noMeta` query param is fully deprecated.
+		 * Checks to see if the `metadata` query param is inputted.
 		 */
 		if (metadata) {
 			switch (metadata) {