fix(flagd): Remove unused imports

Signed-off-by: Guido Breitenhuber <[email protected]>

Author: guidobrei

providers/flagd/src/main/java/dev/openfeature/contrib/providers/flagd/resolver/common/ChannelConnector.java

@@ -5,8 +5,6 @@
 import dev.openfeature.sdk.ProviderEvent;
 import io.grpc.ConnectivityState;
 import io.grpc.ManagedChannel;
-import io.grpc.stub.AbstractBlockingStub;
-import io.grpc.stub.AbstractStub;
 import java.util.Collections;
 import java.util.concurrent.TimeUnit;
 import java.util.function.Consumer;