removed unused static import .

Author: misselvexu

sdk-server-common/src/test/java/io/a2a/server/tasks/TaskManagerTest.java

@@ -7,8 +7,6 @@
 import static org.junit.jupiter.api.Assertions.assertSame;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
-import static org.junit.jupiter.api.Assertions.assertThrows;
-import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.util.Collections;
 import java.util.HashMap;