hgcia: remove hgcia (BC)

As discussed at:
https://www.mercurial-scm.org/pipermail/mercurial-devel/2016-March/081018.html,
cia service is down for years. It also uses socket.setdefaulttimeout() which
will break chg. This patch removes the extension.

contrib/win32/mercurial.ini

@@ -46,7 +46,6 b' editor = notepad'
 ;extdiff =
 ;fetch =
 ;gpg =
-;hgcia =
 ;hgk =
 ;highlight = 
 ;histedit =

mercurial/extensions.py

@@ -25,7 +25,7 b' from . import ('
 _aftercallbacks = {}
 _order = []
 _builtin = set(['hbisect', 'bookmarks', 'parentrevspec', 'progress', 'interhg',
-                'inotify'])
+                'inotify', 'hgcia'])
 
 def extensions(ui=None):
     if ui:

tests/test-check-py3-compat.t

@@ -7,7 +7,6 b''
   hgext/fsmonitor/pywatchman/__init__.py requires print_function
   hgext/fsmonitor/pywatchman/capabilities.py not using absolute_import
   hgext/fsmonitor/pywatchman/pybser.py not using absolute_import
-  hgext/hgcia.py not using absolute_import
   hgext/highlight/__init__.py not using absolute_import
   hgext/highlight/highlight.py not using absolute_import
   hgext/largefiles/__init__.py not using absolute_import
@@ -68,7 +67,6 b''
   hgext/fsmonitor/watchmanclient.py: error importing module: <SystemError> Parent module 'hgext.fsmonitor' not loaded, cannot perform relative import (line *) (glob)
   hgext/gpg.py: error importing: <AttributeError> 'dict' object has no attribute 'iteritems' (error at revset.py:*) (glob)
   hgext/graphlog.py: error importing: <AttributeError> 'dict' object has no attribute 'iteritems' (error at revset.py:*) (glob)
-  hgext/hgcia.py: error importing: <AttributeError> 'dict' object has no attribute 'iteritems' (error at revset.py:*) (glob)
   hgext/hgk.py: error importing: <AttributeError> 'dict' object has no attribute 'iteritems' (error at revset.py:*) (glob)
   hgext/histedit.py: error importing module: <SyntaxError> invalid syntax (bundle*.py, line *) (line *) (glob)
   hgext/keyword.py: error importing: <ImportError> No module named 'BaseHTTPServer' (error at common.py:*) (glob)

tests/test-help.t

@@ -260,7 +260,6 b' Test extension help:'
        extdiff       command to allow external programs to compare revisions
        factotum      http authentication with factotum
        gpg           commands to sign and verify changesets
-       hgcia         hooks for integrating with the CIA.vc notification service
        hgk           browse the repository in a graphical way
        highlight     syntax highlighting for hgweb (requires Pygments)
        histedit      interactive history editing