Remove redundant call to SetFlagsRule.initAllFlagsToReleaseConfigDefault()

Test: atest
Bug: 336802415
Flag: test_only
Merged-In: Ic2cfdbb292daf12d19ab565e684d7cc8295e52f3
Change-Id: Ic2cfdbb292daf12d19ab565e684d7cc8295e52f3
diff --git a/tests/src/com/android/ims/ImsManagerTest.java b/tests/src/com/android/ims/ImsManagerTest.java
index 9e206b7..4055c97 100644
--- a/tests/src/com/android/ims/ImsManagerTest.java
+++ b/tests/src/com/android/ims/ImsManagerTest.java
@@ -140,8 +140,6 @@
         InstrumentationRegistry.getInstrumentation().getUiAutomation()
                 .adoptShellPermissionIdentity(
                         "android.permission.READ_PRIVILEGED_PHONE_STATE");
-
-        mSetFlagsRule.initAllFlagsToReleaseConfigDefault();
     }
 
     @After