<mdspan>: Drop #pragma once - #3901

<mdspan>: Drop #pragma once#3901

Stephan T. Lavavej (StephanTLavavej) merged 1 commit into

microsoft:feature/mdspan2microsoft/STL:feature/mdspan2from

frederick-vs-ja:pragma-zero-mdspanfrederick-vs-ja/STL:pragma-zero-mdspanCopy head branch name to clipboard