tags: silence warning about unknown tags

This is mostly a nuisance and can happen legitimately with pull -r, etc.

mercurial/localrepo.py

@@ -262,7 +262,7 b' class localrepository(repo.repository):'
                     warn(_("node '%s' is not well formed") % node)
                     continue
                 if bin_n not in self.changelog.nodemap:
-                    warn(_("tag '%s' refers to unknown node") % key)
+                    # silently ignore as pull -r might cause this
                     continue
 
                 h = []

tests/test-tags.out

@@ -26,14 +26,12 b' created new head'
 .hgtags@c071f74ab5eb, line 2: cannot parse entry
 .hgtags@c071f74ab5eb, line 4: node 'foo' is not well formed
 .hgtags@4ca6f1b1a68c, line 2: node 'x' is not well formed
-localtags, line 1: tag 'invalid' refers to unknown node
 tip                                8:4ca6f1b1a68c
 first                              0:0acdaf898367
 changeset:   8:4ca6f1b1a68c
 .hgtags@c071f74ab5eb, line 2: cannot parse entry
 .hgtags@c071f74ab5eb, line 4: node 'foo' is not well formed
 .hgtags@4ca6f1b1a68c, line 2: node 'x' is not well formed
-localtags, line 1: tag 'invalid' refers to unknown node
 tag:         tip
 parent:      3:b2ef3841386b
 user:        test