Revert "openssl: add custom build of 1.0.2 for steam"
No longer necessary. See https://github.com/NixOS/nixpkgs/pull/23034#issuecomment-291005754
This reverts commit a50784b34e771aa4a6c5f4eeb8c25295c15e4ed4.
authored by David McFarland and committed by Frederik Rietdijk 2c006ca8 398823da