modify testcases Signed-off-by: ling990 <liling96@huawei.com>

Signed-off-by: Nling990 <ling990@qq.com>

multimedia/media/media_js_standard/audioEncoder/src/main/js/test/AudioEncoderFuncCallbackTest.test.js

@@ -350,7 +350,6 @@ describe('AudioEncoderFuncCallback', function () {
                 }
             }
             else{
-                writeHead(savepath, outputobject.length);
                 writeFile(savepath, outputobject.data, outputobject.length);
                 console.info("write to file success");
             }

multimedia/media/media_js_standard/audioEncoder/src/main/js/test/AudioEncoderFuncPromiseTest.test.js

@@ -354,7 +354,6 @@ describe('AudioEncoderFuncPromise', function () {
                 }
             }
             else{
-                writeHead(savepath, outputobject.length);
                 writeFile(savepath, outputobject.data, outputobject.length);
                 console.info("write to file success");
             }

multimedia/media/media_js_standard/audioEncoder/src/main/js/test/AudioEncoderMultiInstancesTest.test.js

@@ -246,7 +246,6 @@ describe('AudioEncoderFuncPromise', function () {
                 }
             }
             else{
-                writeHead(savepath, outputobject.length);
                 writeFile(savepath, outputobject.data, outputobject.length);
                 console.info("write to file success");
             }