filemerge._idump: drop no longer necessary 'if r:' check

Cleanup from an earlier patch to make premerge be directly called from the main
filemerge function.

mercurial/filemerge.py

@@ -346,8 +346,6 b' def _idump(repo, mynode, orig, fcd, fco,'
     ``a.txt``, these files will accordingly be named ``a.txt.local``,
     ``a.txt.other`` and ``a.txt.base`` and they will be placed in the
     same directory as ``a.txt``."""
-    r = 1
-    if r:
         a, b, c, back = files
 
         fd = fcd.path()
@@ -355,7 +353,7 b' def _idump(repo, mynode, orig, fcd, fco,'
         util.copyfile(a, a + ".local")
         repo.wwrite(fd + ".other", fco.data(), fco.flags())
         repo.wwrite(fd + ".base", fca.data(), fca.flags())
-    return False, r
+    return False, 1
 
 def _xmerge(repo, mynode, orig, fcd, fco, fca, toolconf, files, labels=None):
     r = 1