Remove unused log tags

Co-authored-by: Jaehwa Noh <shwoghk14@gmail.com>

benchmarks/src/main/kotlin/com/google/samples/apps/nowinandroid/foryou/ForYouActions.kt

@@ -25,8 +25,6 @@ import com.google.samples.apps.nowinandroid.waitAndFindObject
 import com.google.samples.apps.nowinandroid.waitForObjectOnTopAppBar
 import org.junit.Assert.fail
 
-private const val TAG = "ForYouActions"
-
 fun MacrobenchmarkScope.forYouWaitForContent() {
     // Wait until content is loaded by checking if topics are loaded
     device.wait(Until.gone(By.res("loadingWheel")), 5_000)

benchmarks/src/main/kotlin/com/google/samples/apps/nowinandroid/interests/InterestsActions.kt

@@ -23,8 +23,6 @@ import com.google.samples.apps.nowinandroid.flingElementDownUp
 import com.google.samples.apps.nowinandroid.waitForObjectOnTopAppBar
 import org.junit.Assert.fail
 
-private const val TAG = "InterestsActions"
-
 fun MacrobenchmarkScope.goToInterestsScreen() {
     device.findObject(By.text("Interests")).click()
     device.waitForIdle()