[PATCH 4 of 6 for-clowncopter] trydiff: remove dead branch in diffline()

[Martin von Zweigbergk]

# HG changeset patch
# User Martin von Zweigbergk <martinvonz at google.com>
# Date 1421450549 28800
#      Fri Jan 16 15:22:29 2015 -0800
# Node ID fc234a3f6f8ac43ef2067aef9136c012bccbe6eb
# Parent  5449a60f29e4b8012fb8754a117876530547d138
trydiff: remove dead branch in diffline()

Since diffline() is never called when 'revs' is empty, it doesn't need
to handle that case.

diff -r 5449a60f29e4 -r fc234a3f6f8a mercurial/patch.py
--- a/mercurial/patch.py	Fri Jan 16 15:19:57 2015 -0800
+++ b/mercurial/patch.py	Fri Jan 16 15:22:29 2015 -0800
@@ -1755,11 +1755,8 @@
 
     def diffline(f, revs):
         if not repo.ui.quiet:
-            if revs:
-                revinfo = ' '.join(["-r %s" % rev for rev in revs])
-                line = 'diff %s %s\n' % (revinfo, f)
-            else:
-                line = 'diff %s\n' % f
+            revinfo = ' '.join(["-r %s" % rev for rev in revs])
+            line = 'diff %s %s\n' % (revinfo, f)
         else:
             line = ''
         return line