Nit changes

Author: wangmengyan95

Parse/src/main/java/com/parse/ParseFile.java

@@ -328,6 +328,7 @@ public Task<Void> then(Task<State> task) throws Exception {
             state = task.getResult();
             // Since we have successfully uploaded the file, we do not need to hold the file pointer
             // anymore.
+            data = null;
             file = null;
             return task.makeVoid();
           }
@@ -359,9 +360,6 @@ public Task<Void> then(Task<String> task) throws Exception {
       public Task<Void> then(Task<Void> task) throws Exception {
         cts.trySetResult(null); // release
         currentTasks.remove(cts);
-        // Clear in memory file pointer and data
-        data = null;
-        file = null;
         return task;
       }
     });
@@ -439,8 +437,7 @@ public Task<byte[]> then(Task<Void> toAwait) throws Exception {
           public byte[] then(Task<File> task) throws Exception {
             File file = task.getResult();
             try {
-              byte[] data =  ParseFileUtils.readFileToByteArray(file);
-              return data;
+              return ParseFileUtils.readFileToByteArray(file);
             } catch (IOException e) {
               // do nothing
             }
@@ -542,7 +539,7 @@ public Task<File> then(Task<File> task) throws Exception {
    * @return A Task that is resolved when the data has been fetched.
    */
   public Task<File> getFileInBackground() {
-    return getFileInBackground((ProgressCallback)null);
+    return getFileInBackground((ProgressCallback) null);
   }
 
   /**