cleanup: drop enumerate() when index is not used

mercurial/extensions.py

@@ -68,7 +68,7 def load(ui, name, path):
 
 def loadall(ui):
     result = ui.configitems("extensions")
-    for i, (name, path) in enumerate(result):
+    for (name, path) in result:
         if path:
             if path[0] == '!':
                 continue

mercurial/hgweb/webcommands.py

@@ -642,7 +642,7 def graph(web, req, tmpl):
     tree = list(graphmod.graph(web.repo, rev, downrev))
     canvasheight = (len(tree) + 1) * bg_height - 27;
     data = []
-    for i, (ctx, vtx, edges) in enumerate(tree):
+    for (ctx, vtx, edges) in tree:
         node = short(ctx.node())
         age = templatefilters.age(ctx.date())
         desc = templatefilters.firstline(ctx.description())