修复bug，会议管理新申请会议的时候添加附件的情况下会保存出错

o2android/app/src/main/java/net/zoneland/x/bpm/mobile/v1/zoneXBPM/app/meeting/apply/MeetingApplyActivity.kt

@@ -16,7 +16,6 @@ import com.borax12.materialdaterangepicker.time.RadialPickerLayout
 import com.borax12.materialdaterangepicker.time.TimePickerDialog
 import kotlinx.android.synthetic.main.content_meeting_create_form.*
 import net.muliba.fancyfilepickerlibrary.FilePicker
-import net.zoneland.x.bpm.mobile.v1.zoneXBPM.O2App
 import net.zoneland.x.bpm.mobile.v1.zoneXBPM.O2SDKManager
 import net.zoneland.x.bpm.mobile.v1.zoneXBPM.R
 import net.zoneland.x.bpm.mobile.v1.zoneXBPM.app.base.BaseMVPActivity