[nn] MultiLabelSoftMarginLoss : no batch dim support (#65690)
Summary:
Reference: https://github.com/pytorch/pytorch/issues/60585
cc albanD mruberry jbschlosser walterddr
Pull Request resolved: https://github.com/pytorch/pytorch/pull/65690
Reviewed By: zou3519
Differential Revision: D31731162
Pulled By: jbschlosser
fbshipit-source-id: d26f27555f78afdadd49126e0548a8bfda50cc5a
