fix: remove unsupported previous_token from search params (#620)

Author: plhery

src/types/v2/tweet.v2.types.ts

@@ -21,7 +21,6 @@ export interface TweetV2TimelineParams extends Partial<Tweetv2FieldsParams> {
 }
 
 export interface Tweetv2SearchParams extends TweetV2TimelineParams {
-  previous_token?: string;
   query: string;
   sort_order?: 'recency' | 'relevancy';
 }