fixup! gitk: work around the command line limit on Windows

This was an ugly hack, and in preparation for fixing it the right way,
we revert this hack.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

gitk-git/gitk

@@ -10177,19 +10177,7 @@ proc getallcommits {} {
 	}
     }
     if {$ids ne {}} {
-	set cmd [concat $cmd $ids]
-	# The maximum command line length for the CreateProcess function is 32767 characters, see
-	# http://blogs.msdn.com/oldnewthing/archive/2003/12/10/56028.aspx
-	# Be a little conservative in case Tcl adds some more stuff to the command line we do not
-	# know about and truncate the command line at a SHA1-boundary below 32000 characters.
-	if {[tk windowingsystem] == "win32" &&
-		[string length $cmd] > 32000} {
-	    set ndx [string last " " $cmd 32000]
-	    if {$ndx != -1} {
-		set cmd [string range $cmd 0 $ndx]
-	    }
-	}
-	set fd [open $cmd r]
+	set fd [open [concat $cmd $ids] r]
 	fconfigure $fd -blocking 0
 	incr allcommits
 	nowbusy allcommits