delete useless code

Author: YangSen-qn

library/src/androidTest/java/com/qiniu/android/http/HttpTest.java

@@ -19,7 +19,6 @@
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
-import java.net.Proxy;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.nio.charset.Charset;

library/src/main/java/com/qiniu/android/storage/UpProgress.java

@@ -3,8 +3,6 @@
 import com.qiniu.android.utils.AsyncRun;
 import com.qiniu.android.utils.LogUtil;
 
-import kotlin.jvm.Synchronized;
-
 class UpProgress {
 
     private long maxProgressUploadBytes = -1;