simplify promise handle

Author: RulaKhaled

packages/core/src/utils/google-genai/index.ts

@@ -236,8 +236,7 @@ function instrumentMethod<T extends unknown[], R>(
             if (finalOptions.recordInputs && args[0] && typeof args[0] === 'object') {
               addPrivateRequestAttributes(span, args[0] as Record<string, unknown>);
             }
-            const result = (originalMethod as (...args: T) => R).apply(context, args);
-
+            const result = originalMethod.apply(context, args);
             // No response attributes for create (returns object of chat instance, not generated content)
             return result;
           } catch (error) {
@@ -263,8 +262,8 @@ function instrumentMethod<T extends unknown[], R>(
             addPrivateRequestAttributes(span, args[0] as Record<string, unknown>);
           }
 
-          const result = await Promise.resolve((originalMethod as (...args: T) => Promise<R>).apply(context, args));
-          addResponseAttributes(span, result as GoogleGenAIResponse, finalOptions.recordOutputs);
+          const result = await originalMethod.apply(context, args);
+          addResponseAttributes(span, result, finalOptions.recordOutputs);
           return result;
         } catch (error) {
           captureException(error, {