fix(测试计划): 修复测试计划取消关联用例，查看执行评论不显示计划名称问题

--bug=1041109 --user=王旭 【测试计划】测试计划取消关联用例，该条用例的执行评论列表无测试计划名称 https://www.tapd.cn/55049933/s/1520426

backend/services/case-management/src/main/java/io/metersphere/functional/mapper/ExtFunctionalCaseTestMapper.xml

@@ -119,8 +119,7 @@
         test_plan_case_execute_history tpceh
         left join user u on  tpceh.create_user = u.id
         left join user_extend ux on  tpceh.create_user = ux.id
-        left join test_plan_functional_case tpfc on  tpceh.test_plan_case_id = tpfc.id
-        left join test_plan tp on  tpfc.test_plan_id = tp.id
+        left join test_plan tp on  tpceh.test_plan_id = tp.id
         where tpceh.case_id = #{caseId}
         <if test="planId != null and planId != ''">
             and tpceh.test_plan_case_id = #{planId}