Remove "Dependencies check" from ppl

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/12608">trac #12608</a>.

Diff for the ppl spkg, for review only

Reported by: jdemeyer

Component: packages

CC: vbraun

Report Upstream: N/A

Authors: Jeroen Demeyer

Dependencies: 

Work issues: 

Reviewers: Volker Braun

Merged in: sage-5.0.beta7

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/12608/ppl-0.11.2.p1.diff">ppl-0.11.2.p1.diff: Diff for the ppl spkg, for review only</a> by jdemeyer at 20120302T08:56:43</li></ol>