Remove unused assertThat import in AbstractRedissonClientTest

Author: trask

instrumentation/redisson/redisson-common/testing/src/main/java/io/opentelemetry/javaagent/instrumentation/redisson/AbstractRedissonClientTest.java

@@ -25,7 +25,6 @@
 import static io.opentelemetry.semconv.incubating.DbIncubatingAttributes.DB_SYSTEM;
 import static io.opentelemetry.semconv.incubating.DbIncubatingAttributes.DB_SYSTEM_NAME;
 import static io.opentelemetry.semconv.incubating.DbIncubatingAttributes.DbSystemNameIncubatingValues.REDIS;
-import static org.assertj.core.api.Assertions.assertThat;
 
 import io.opentelemetry.api.trace.SpanKind;
 import io.opentelemetry.instrumentation.testing.junit.AgentInstrumentationExtension;