There are warnings in the logs during E2E tests

[jodavis]

Describe the bug
The speech recognition system logs a lot of useless warning messages (which were originally logged to see what was going on with the SpeechRecognition library). These are logged during E2E tests, which means we can't fail tests on new warnings that occur.

To Reproduce
Steps to reproduce the behavior:

1. Change all the "I should not see any error messages in the logs" to "I should not see any warning or error messages in the logs" in all E2E tests
2. Run the E2E tests
3. Notice how many tests fail

Expected behavior
The tests should all be changed as described in step 1, and they should still pass because no warnings are logged.

[jodavis]

Probably these log messages shouldn't be warnings, since they are occurring in normal functioning. Maybe they're not useful to log at all and should just be removed. Then the tests can catch new warnings that indicate real problems.