Do not set the binary dir in run-tests, it breaks stuff

This breaks -j and does all sort of other weird stuff I did not
notice in the previous (non-parallel) runs.

Gbp-Dch: ignore

test/integration/run-tests

@@ -1,10 +1,4 @@
 #!/bin/sh
-
-TESTDIR="$(readlink -f "$(dirname "$0")")"
-. "$TESTDIR/framework"
-
-find_project_binary_dir
-
 set -e
 
 TESTTORUN=''