Chore: remove unused imports in ProcessTaskTest

Author: dbmalkovsky

modules/flowable-cmmn-engine-configurator/src/test/java/org/flowable/cmmn/test/ProcessTaskTest.java

@@ -62,8 +62,6 @@
 import org.flowable.variable.api.history.HistoricVariableInstance;
 import org.flowable.variable.api.persistence.entity.VariableInstance;
 import org.flowable.variable.service.impl.types.JsonType;
-import org.junit.jupiter.api.AfterEach;
-import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import com.fasterxml.jackson.databind.JsonNode;