config: remove now-unused support for "includepaths"

This effectively undoes 081b08e4ea13 (templater: look for mapfiles in
template paths, 2015-05-15).

Differential Revision: https://phab.mercurial-scm.org/D8793

mercurial/config.py

@@ -21,10 +21,9 b' from . import ('
 
 
 class config(object):
-    def __init__(self, data=None, includepaths=None):
+    def __init__(self, data=None):
         self._data = {}
         self._unset = []
-        self._includepaths = includepaths or []
         if data:
             for k in data._data:
                 self._data[k] = data[k].copy()
@@ -162,14 +161,11 b' class config(object):'
 
             if m and include:
                 expanded = util.expandpath(m.group(1))
-                includepaths = [os.path.dirname(src)] + self._includepaths
-
-                for base in includepaths:
-                    inc = os.path.normpath(os.path.join(base, expanded))
-
+                inc = os.path.normpath(
+                    os.path.join(os.path.dirname(src), expanded)
+                )
                     try:
                         include(expanded, inc, remap=remap, sections=sections)
-                        break
                     except IOError as inst:
                         if inst.errno != errno.ENOENT:
                             raise error.ParseError(