Revert "std: adjust requested stack size for thread-local storage."

This reverts commit f1b5f59287106fc511d29c425255bd343608065c.

Using a private function of a library is a bad idea: several people (on
Linux) were meeting with linking errors because of it (different/older
versions of glibc).
auto merge of #11331 : huonw/rust/revert-stack-size, r=luqmana

This reverts commit f1b5f59287106fc511d29c425255bd343608065c.

Using a private function of a library is a bad idea: several people (on
Linux) were meeting with linking errors because of it (different/older
versions of glibc).