修改storage子系统fs模块的代码

Signed-off-by: Nhu0475 <huyanqiang5@huawei.com>

storage/crossplatform/storagefsetstest/src/main/ets/test/Common.js

@@ -15,7 +15,6 @@
 
 import fileIO from "@ohos.file.fs";
 import util from "@ohos.util";
-//import featureAbility from '@ohos.ability.featureAbility';
 
 export const FILE_CONTENT = "hello world";
 
@@ -35,24 +34,6 @@ export function prepareFile(fpath, content) {
   }
 }
 
-export function prepare200MFile(fpath) {
-  try {
-    let file = fileIO.openSync(fpath, fileIO.OpenMode.CREATE | fileIO.OpenMode.READ_WRITE);
-    fileIO.truncateSync(file.fd);
-    let bf = new ArrayBuffer(1024 * 1024 * 20);
-    for (let i = 0; i < 10; i++) {
-      let position = bf.byteLength * i;
-      let writeLen = fileIO.writeSync(file.fd, bf, { offset: 0, length: bf.byteLength, position: position, encoding: "utf-8" });
-    }
-    fileIO.fsyncSync(file.fd);
-    fileIO.closeSync(file);
-    return true;
-  } catch (e) {
-    console.log("Failed to prepare200MFile for " + e);
-    return false;
-  }
-}
-
 export async function nextFileName(testName) {
   let context = globalThis.abilityContext;
   let data = context.cacheDir;