chore: remove unused handleData (#108)

Author: Kludex

gateway/src/providers/anthropic.ts

@@ -1,7 +1,6 @@
-import { extractUsage } from '@pydantic/genai-prices'
 import type { ModelAPI } from '../api'
 import { AnthropicAPI } from '../api/anthropic'
-import { DefaultProviderProxy, type JsonData } from './default'
+import { DefaultProviderProxy } from './default'
 
 export class AnthropicProvider extends DefaultProviderProxy {
   protected isWhitelistedEndpoint(): boolean {
@@ -18,23 +17,6 @@ export class AnthropicProvider extends DefaultProviderProxy {
     headers.set('x-api-key', this.providerProxy.credentials)
   }
 
-  // TODO(Marcelo): This should be moved to the `ModelAPI` class, and we need to improve the typing here!
-  protected handleData(data: JsonData) {
-    if ('type' in data && data.type === 'message_start') {
-      const message = 'message' in data ? (data.message as JsonData) : undefined
-      if (message) {
-        const model = 'model' in message ? (message.model as string) : undefined
-        if (model) {
-          this.responseModel = model
-        }
-      }
-    }
-    if ('usage' in data) {
-      const { usage } = extractUsage(this.usageProvider()!, data, this.apiFlavor())
-      this.usage = usage
-    }
-  }
-
   protected responseHeaders(headers: Headers): Headers {
     const newHeaders = super.responseHeaders(headers)
     newHeaders.delete('anthropic-organization-id')

gateway/src/providers/default.ts

@@ -468,8 +468,6 @@ export class DefaultProviderProxy {
     }
   }
 
-  protected handleData(_data: JsonData): void {}
-
   protected isWhitelistedEndpoint(): boolean {
     return false
   }