Revert "Support basic auth in opencode sdk (#4697)"

This reverts commit b9253d0b3b61483f82689a06c906f15ca9620287.

packages/sdk/js/src/client.ts

@@ -24,19 +24,6 @@ export function createOpencodeClient(config?: Config & { directory?: string }) {
     }
   }
 
-  if (config?.baseUrl) {
-    const baseUrl = new URL(config.baseUrl)
-    if (baseUrl.username || baseUrl.password) {
-      config.headers = {
-        ...config.headers,
-        Authorization: `Basic ${btoa(`${baseUrl.username}:${baseUrl.password}`)}`,
-      }
-      baseUrl.username = ""
-      baseUrl.password = ""
-      config.baseUrl = baseUrl.toString()
-    }
-  }
-
   const client = createClient(config)
   return new OpencodeClient({ client })
 }