Delete tabs from becnh_approx.cpp (#51157)
Summary:
Introduced by D25981260 (https://github.com/pytorch/pytorch/commit/f08464f31d60f9079c1631717fda4d8210398c73)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/51157
Reviewed By: bwasti
Differential Revision: D26090008
Pulled By: malfet
fbshipit-source-id: b63f1bb1683c7261902de7eaab24a05a5159ce7e
