Get rid of any unnecessary reset calls

Calling resets at the beginning of setUp is unnecessary.

Bug: 315368147
Test: TH

Change-Id: I87030bc867d90752e745fd4a274581d1f3230f85
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/UpstreamNetworkMonitorTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/UpstreamNetworkMonitorTest.java
index 045c0cb..90fd709 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/UpstreamNetworkMonitorTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/UpstreamNetworkMonitorTest.java
@@ -108,9 +108,6 @@
 
     @Before public void setUp() throws Exception {
         MockitoAnnotations.initMocks(this);
-        reset(mContext);
-        reset(mCS);
-        reset(mLog);
         when(mLog.forSubComponent(anyString())).thenReturn(mLog);
         when(mEntitleMgr.isCellularUpstreamPermitted()).thenReturn(true);