Do not run zipalign when re-signing APKs.

Running zipalign is no longer needed because signapk takes care of
alignment.

Bug: 25794543
Change-Id: I1080240a67ea6f1b41585fff83d18d57fdcf44e2
diff --git a/tools/releasetools/sign_target_files_apks.py b/tools/releasetools/sign_target_files_apks.py
index cbf78a1..baf60f5 100755
--- a/tools/releasetools/sign_target_files_apks.py
+++ b/tools/releasetools/sign_target_files_apks.py
@@ -134,7 +134,7 @@
 
   signed = tempfile.NamedTemporaryFile()
 
-  common.SignFile(unsigned.name, signed.name, keyname, pw, align=4)
+  common.SignFile(unsigned.name, signed.name, keyname, pw)
 
   data = signed.read()
   unsigned.close()