refactor: cleanup imports (planning#1151)

client/src/main/java/dev/fitko/fitconnect/api/services/schema/SchemaProvider.java

@@ -4,7 +4,6 @@ import dev.fitko.fitconnect.api.domain.model.metadata.Metadata;
 import dev.fitko.fitconnect.api.exceptions.internal.SchemaNotFoundException;
 
 import java.net.URI;
-import java.util.List;
 
 /**
  * Central schema provider that gives access to the current schemas for {@link Metadata} and the security-event-token.