Fix lint errors in ProcNetTest.

Test: test-only change
Change-Id: If3702cf9c3a36e3b7cb1853784f1a8ff98d7be07
diff --git a/tests/cts/hostside/src/com/android/cts/net/ProcNetTest.java b/tests/cts/hostside/src/com/android/cts/net/ProcNetTest.java
index ff06a90..e3e9271 100644
--- a/tests/cts/hostside/src/com/android/cts/net/ProcNetTest.java
+++ b/tests/cts/hostside/src/com/android/cts/net/ProcNetTest.java
@@ -22,11 +22,9 @@
 import com.android.tradefed.testtype.IBuildReceiver;
 import com.android.tradefed.testtype.IDeviceTest;
 
-import java.lang.Integer;
-import java.lang.String;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
-import java.util.ArrayList;
 
 /**
  * Host-side tests for values in /proc/net.