Drop the comments from the double start guard

Review feedback: the guard, the warning it logs and the test names carry
the meaning on their own.

libraries/voicerecorder/impl/src/main/kotlin/io/element/android/libraries/voicerecorder/impl/DefaultVoiceRecorder.kt

@@ -72,11 +72,6 @@ class DefaultVoiceRecorder(
 
     @RequiresPermission(Manifest.permission.RECORD_AUDIO)
     override suspend fun startRecord() = lock.withLock {
-        // The composer can emit a second Start before the first recording has produced its first
-        // buffer, i.e. before the state flips away from Idle. Without this guard the second call
-        // orphans the first job and its AudioReader, which keeps the microphone open and keeps
-        // emitting Recording forever, so Stop and Delete appear to do nothing.
-        // See https://github.com/element-hq/element-x-android/issues/5780
         if (recordingJob != null) {
             Timber.w("Voice recorder is already recording, ignoring this start")
             return@withLock

libraries/voicerecorder/impl/src/test/kotlin/io/element/android/libraries/voicerecorder/impl/DefaultVoiceRecorderTest.kt

@@ -116,7 +116,6 @@ class DefaultVoiceRecorderTest {
         voiceRecorder.state.test {
             assertThat(awaitItem()).isEqualTo(VoiceRecorderState.Idle)
 
-            // Two taps landing before the state has flipped away from Idle.
             voiceRecorder.startRecord()
             voiceRecorder.startRecord()
             assertThat(audioReaderFactory.createdCount).isEqualTo(1)
@@ -133,7 +132,6 @@ class DefaultVoiceRecorderTest {
                     duration = 5.seconds,
                 )
             )
-            // An orphaned recording job would keep emitting Recording after the stop.
             expectNoEvents()
         }
     }

libraries/voicerecorder/impl/src/test/kotlin/io/element/android/libraries/voicerecorder/test/FakeAudioReaderFactory.kt

@@ -16,7 +16,6 @@ import io.element.android.libraries.voicerecorder.impl.audio.AudioReader
 class FakeAudioReaderFactory(
     private val audio: List<Audio>
 ) : AudioReader.Factory {
-    /** Number of readers created so far, to assert that a second recording is never started. */
     var createdCount: Int = 0
         private set