fix:计算课酬时，学生人数从课程上取

mec-biz/src/main/java/com/ym/mec/biz/service/impl/TeacherDefaultMusicGroupSalaryServiceImpl.java

@@ -181,7 +181,6 @@ public class TeacherDefaultMusicGroupSalaryServiceImpl extends BaseServiceImpl<L
 									}
 									if(CourseScheduleType.HIGH.equals(tdms.getCourseScheduleType())){
 										int studentNum = courseScheduleStudentPaymentDao.countCourseOnlyStudentNum(ts.getCourseScheduleId());
-										studentNum = 0;
 										ts.setExpectSalary(ts.getExpectSalary().multiply(new BigDecimal(studentNum)));
 									}
 									list.add(ts);