Auto merge of #27534 - alexcrichton:revert-adding-gdb-pp-tests, r=michaelwoerister

… are not actually broken."

This reverts commit 354cf4b.


Unfortunately these [tests are failing](http://buildbot.rust-lang.org/builders/nightly-dist-rustc-linux/builds/224/steps/distcheck/logs/stdio) on the snapshot/nightly bots with the [same message](https://gist.github.com/alexcrichton/611705ded07b0d73ded9) found in #27514

Author: bors