remove deprecated runtimes

builds/runtimes/pypy-1.7

builds/runtimes/pypy-1.8

builds/runtimes/pypy-1.9

builds/runtimes/pypy-2.0

builds/runtimes/pypy-2.0.1

builds/runtimes/pypy-2.0.2

builds/runtimes/pypy-2.1

builds/runtimes/pypy-2.2

builds/runtimes/pypy-2.2.1

builds/runtimes/pypy-2.3

builds/runtimes/pypy-2.3.1

builds/runtimes/pypy-2.4.0

builds/runtimes/pypy-2.5.0

builds/runtimes/pypy-2.5.1

builds/runtimes/pypy-2.6.0

builds/runtimes/pypy-2.6.1

builds/runtimes/pypy-4.0.0

builds/runtimes/pypy-4.0.1

builds/runtimes/pypy-5.0.0

builds/runtimes/pypy-5.0.1