Remove LOG(INFO) from math_cpu.cc (#27001)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/27001
This unconditional log line spams the logs enough that it's a drag on cpu and will eventually fill up logs.
Test Plan: Allow unit test and automated testing to give feedback.
Reviewed By: jspark1105
Differential Revision: D17638140
fbshipit-source-id: 4e8a44bda31327ba7e797f7579a9e3bf866eef7e
