Remove support for the extra <remote> definitions in manifests

These aren't that widely used, and actually make it difficult for
users to fully mirror a forest of repositories, and then permit
someone else to clone off that forest, rather then the original
upstream servers.

Signed-off-by: Shawn O. Pearce <sop@google.com>
diff --git a/remote.py b/remote.py
index 2a9bc7d..bb8f740 100644
--- a/remote.py
+++ b/remote.py
@@ -16,9 +16,7 @@
 class Remote(object):
   def __init__(self, name,
                fetch=None,
-               review=None,
-               projectName=None):
+               review=None):
     self.name = name
     self.fetchUrl = fetch
     self.reviewUrl = review
-    self.projectName = projectName