Remove Map null annotation workarounds (#8916)

These workarounds to prevent false positives can be removed now the EEAs allow for proper null analysis.

Signed-off-by: Wouter Born <github@maindrain.net>

bundles/org.openhab.binding.kodi/src/main/java/org/openhab/binding/kodi/internal/KodiHandlerFactory.java

@@ -60,7 +60,7 @@ public class KodiHandlerFactory extends BaseThingHandlerFactory {
     private final KodiDynamicStateDescriptionProvider stateDescriptionProvider;
     private final WebSocketClient webSocketClient;
 
-    private final Map<String, @Nullable ServiceRegistration<AudioSink>> audioSinkRegistrations = new ConcurrentHashMap<>();
+    private final Map<String, ServiceRegistration<AudioSink>> audioSinkRegistrations = new ConcurrentHashMap<>();
 
     // url (scheme+server+port) to use for playing notification sounds
     private @Nullable String callbackUrl;