chore(ocean-api-client): remove deprecated RawTx.ts (#1992)

#### What this PR does / why we need it:

As per title.

#### Which issue(s) does this PR fixes?:

Fixes #1989

packages/ocean-api-client/src/index.ts

@@ -1,26 +1,7 @@
-export * from './apis/RawTx'
-
 export * from './errors/ApiException'
 export * from './errors/ApiValidationException'
 export * from './errors/ClientException'
 export * from './errors/TimeoutException'
 
 export * from './ApiResponse'
 export * from './OceanApiClient'
-
-// TODO(fuxingloh):
-//  export * from './api/Fee'
-//  import { OceanApiClient } from '../OceanApiClient'
-//
-//  export class Fee {
-//    constructor (private readonly client: OceanApiClient) {
-//    }
-//
-//    /**
-//     * @param {number} confirmationTarget in blocks till fee get confirmed
-//     * @return {Promise<number>} fee rate per KB
-//     */
-//    async estimate (confirmationTarget: number = 10): Promise<number> {
-//      return await this.client.requestData('GET', `fee/estimate?confirmationTarget=${confirmationTarget}`)
-//    }
-//  }