fix: remove unnecessary safe property access

these were non-null properties and do not need safe access,
it is flagged as a warning (which we fail on with -Werror)
in new kotlin

Author: mikehardy

AnkiDroid/src/test/java/com/ichi2/anki/AnalyticsTest.kt

@@ -117,7 +117,7 @@ class AnalyticsTest {
 
                 // prepare analytics so we can inspect what happens
                 val spyHit = spy(ExceptionHit())
-                doReturn(spyHit).whenever(analytics)?.exception()
+                doReturn(spyHit).whenever(analytics).exception()
                 try {
                     UsageAnalytics.sendAnalyticsException(grandparentException, false)
                 } catch (e: Exception) {