还原考生删除的逻辑，去掉已上传禁止删除的限制

stmms-web/src/main/webapp/WEB-INF/views/modules/exam/studentList.jsp

@@ -211,7 +211,7 @@
             <td>
                 <c:if test="${web_user.schoolAdmin==true}">
                     <a href="${ctx}/admin/exam/student/update?id=${student.id}">修改</a>
-                    <c:if test="${examType!='MULTI_MEDIA' && student.upload==false}">
+                    <c:if test="${examType!='MULTI_MEDIA'}">
                         &nbsp;
                         <a href="${ctx}/admin/exam/student/delete?id=${student.id}" onclick="return confirmx('确认要删除该考生吗？', this.href)">删除</a>
                     </c:if>