dirstate: remove meaningless dirstateguard

dirstate: remove meaningless dirstateguard

Previous patch made dirstate changes in a transaction scope "all or
nothing". Therefore, 'dirstateguard' is meaningless, if its scope is
as same as one of the related transaction.

This patch removes such meaningless 'dirstateguard' usage.

--- a/hgext/mq.py	Fri Oct 09 03:53:46 2015 +0900
+++ b/hgext/mq.py	Fri Oct 09 03:53:46 2015 +0900
@@ -816,10 +816,9 @@
     def apply(self, repo, series, list=False, update_status=True,
               strict=False, patchdir=None, merge=None, all_files=None,
               tobackup=None, keepchanges=False):
-        wlock = dsguard = lock = tr = None
+        wlock = lock = tr = None
         try:
             wlock = repo.wlock()
-            dsguard = cmdutil.dirstateguard(repo, 'mq.apply')
             lock = repo.lock()
             tr = repo.transaction("qpush")
             try:
@@ -828,12 +827,10 @@
                                   tobackup=tobackup, keepchanges=keepchanges)
                 tr.close()
                 self.savedirty()
-                dsguard.close()
                 return ret
             except AbortNoCleanup:
                 tr.close()
                 self.savedirty()
-                dsguard.close()
                 raise
             except: # re-raises
                 try:
@@ -843,7 +840,7 @@
                     self.invalidate()
                 raise
         finally:
-            release(tr, lock, dsguard, wlock)
+            release(tr, lock, wlock)
             self.removeundo(repo)
 
     def _apply(self, repo, series, list=False, update_status=True,

--- a/hgext/transplant.py	Fri Oct 09 03:53:46 2015 +0900
+++ b/hgext/transplant.py	Fri Oct 09 03:53:46 2015 +0900
@@ -127,10 +127,9 @@
         diffopts = patch.difffeatureopts(self.ui, opts)
         diffopts.git = True
 
-        lock = wlock = tr = dsguard = None
+        lock = wlock = tr = None
         try:
             wlock = repo.wlock()
-            dsguard = cmdutil.dirstateguard(repo, 'transplant')
             lock = repo.lock()
             tr = repo.transaction('transplant')
             for rev in revs:
@@ -203,7 +202,6 @@
                             # Do not rollback, it is up to the user to
                             # fix the merge or cancel everything
                             tr.close()
-                            dsguard.close()
                             raise
                         if n and domerge:
                             self.ui.status(_('%s merged at %s\n') % (revstr,
@@ -216,7 +214,6 @@
                         if patchfile:
                             os.unlink(patchfile)
             tr.close()
-            dsguard.close()
             if pulls:
                 exchange.pull(repo, source.peer(), heads=pulls)
                 merge.update(repo, pulls[-1], False, False, None)
@@ -227,8 +224,6 @@
                 tr.release()
             if lock:
                 lock.release()
-            if dsguard:
-                dsguard.release()
             wlock.release()
 
     def filter(self, filter, node, changelog, patchfile):

--- a/mercurial/cmdutil.py	Fri Oct 09 03:53:46 2015 +0900
+++ b/mercurial/cmdutil.py	Fri Oct 09 03:53:46 2015 +0900
@@ -2507,10 +2507,9 @@
     base = old.p1()
     createmarkers = obsolete.isenabled(repo, obsolete.createmarkersopt)
 
-    wlock = dsguard = lock = newid = None
+    wlock = lock = newid = None
     try:
         wlock = repo.wlock()
-        dsguard = dirstateguard(repo, 'amend')
         lock = repo.lock()
         tr = repo.transaction('amend')
         try:
@@ -2682,7 +2681,6 @@
             tr.close()
         finally:
             tr.release()
-        dsguard.close()
         if not createmarkers and newid != old.node():
             # Strip the intermediate commit (if there was one) and the amended
             # commit
@@ -2691,7 +2689,7 @@
             ui.note(_('stripping amended changeset %s\n') % old)
             repair.strip(ui, repo, old.node(), topic='amend-backup')
     finally:
-        lockmod.release(lock, dsguard, wlock)
+        lockmod.release(lock, wlock)
     return newid
 
 def commiteditor(repo, ctx, subs, editform=''):