Bug#702094: perl: Remove 5.12/5.14 deprecation deps

[Dominic Hargreaves]

Package: perl
Version: 5.16.2-2
Severity: normal
Tags: experimental

It was agreed in #629472 that those modules deprecated in 5.12 and 5.14
should be added as Depends/Recommends for one release cycle. 5.16 in
experimental is part of the next release cycle, so the following should
be removed from Depends/Recommends/Suggests in our experimental packages:

Package                 Deprecated in       Removed in      current dep
libswitch-perl          5.12                5.14            Depends
libclass-isa-perl       5.12                5.14            Depends
libshell-perl           5.14                5.16            Recommends
libperl4-corelibs-perl  5.14                5.16            Recommends
libdevel-dprof-perl     5.14                5.16            Recommends
libpod-plainer-perl     5.12                5.14            Suggests