Revert "Enable incremental builder to find files that moved, and try to process them via patch + rename, instead of delete + add."

This reverts commit 37335b4238.

Change-Id: I61cc125d3b08eaa300a7774b6607dbb43f0e7148

tools/releasetools/edify_generator.py

@@ -184,11 +184,6 @@ class EdifyGenerator(object):
     cmd = "delete(" + ",\0".join(['"%s"' % (i,) for i in file_list]) + ");"
     self.script.append(self._WordWrap(cmd))
 
-  def RenameFile(self, srcfile, tgtfile):
-    """Moves a file from one location to another."""
-    if self.info.get("update_rename_support", False):
-      self.script.append('rename("%s", "%s");' % (srcfile, tgtfile))
-
   def ApplyPatch(self, srcfile, tgtfile, tgtsize, tgtsha1, *patchpairs):
     """Apply binary patches (in *patchpairs) to the given srcfile to
     produce tgtfile (which may be "-" to indicate overwriting the