remove unused function

src/zope/mkzeoinstance/__init__.py

@@ -202,17 +202,6 @@ def create(self, home, params):
         makexfile(runzeo_template, home, "bin", "runzeo", **params)
 
 
-def which(program):
-    strpath = os.getenv("PATH")
-    binpath = strpath.split(os.pathsep)
-    for dir in binpath:
-        path = os.path.join(dir, program)
-        if os.path.isfile(path) and os.access(path, os.X_OK):
-            if not os.path.isabs(path):
-                path = os.path.abspath(path)
-            return path
-    raise IOError("can't find %r on path %r" % (program, strpath))
-
 def makedir(*args):
     path = ""
     for arg in args: