remove _pkgname_without_arch (and refs)

This function is old code that is unneeded due to changes in how salt
manages packages. It also represents a bug in which trying to use a
pkg.removed state using the pkgname:i386 format used by apt for 32-bit
packages on 64-bit systems always fails, because the package is
identified as pkgname, not pkgname:i386.  Additionally, using just
"pkgname" in your pkg.removed state would fail, because running "apt-get
remove pkgname" would fail for pkgname:i386.
Merge pull request #6104 from terminalmage/quickfix

remove _pkgname_without_arch (and refs)
salt/modules/omapi.py: rm unused imports

************* Module salt.modules.omapi
W0611: 16,0: Unused import base64
W0611: 19,0: Unused import salt
states/iptables.py: rm unused imports

************* Module salt.states.iptables
W0611: 23,0: Unused import sys
W0611: 24,0: Unused import pprint
modules/iptables.py: fix pylint W1401 (Anomalous backslash in string)
solaris_group, pw_group: add missing imports and logger creations
states.mount: fix typos; want assignment, not equality
states/service.py: rm unused import of `sys`

************* Module salt.states.service
W0611: 39,0: Unused import sys
Merge pull request #6107 from cvrebert/patch-3

states/iptables.py: rm unused imports
Merge pull request #6108 from cvrebert/patch-4

modules/iptables.py: fix pylint W1401 (Anomalous backslash in string)
Merge pull request #6106 from cvrebert/patch-2

salt/modules/omapi.py: rm unused imports
Merge pull request #6109 from hulu/group-modules-fixes

solaris_group, pw_group: add missing imports and logger creations
Merge pull request #6110 from cvrebert/patch-5

states.mount: fix typos; want assignment, not equality
Merge pull request #6111 from cvrebert/patch-6

states/service.py: rm unused import of `sys`
integrate pylint with Travis
squelch E0611 due to pylint not seeing distutils.version for some reason
squelch E0211 due to implementation trick in OrderedDict.update()
squelch W0102 due to implementation trick in OrderedDict.__repr__()
squelch E0102 due to legitimate progressive enhancement redefinitions of funcs
squelch E0611 under Python 2.6 where collections.OrderedDict doesn't exist