Bug#977533: pytorch: FTBFS with fmtlib 1.7.3

[Shengjing Zhu <zhsj@debian.org>]

Source: pytorch
Version: 1.7.0-2
Severity: important
X-Debbugs-Cc: zhsj@debian.org

Dear Maintainer,

When rebuild your package with fmtlib from experimental, it FTBFS.

However it just fails when dpkg-gensymbols.

The symbols file you provided, contains internal API of fmtlib,
for example all `_ZN3fmt2v68internal`.

It doesn't make sense for pytorch to expose these info in its symbols
file. I suggest just removing these. And C++ symbols are just nightmare,
it's better just drop the symbols file.

Thanks