subcommand: Remove useless "lambda_function"

TEST=None
BUG=None

Change-Id: I5930356d43a5eb67c156f56ca3cf4217ac40f8e1
Reviewed-on: https://chromium-review.googlesource.com/627977
Commit-Ready: Paul Hobbs <phobbs@google.com>
Tested-by: Paul Hobbs <phobbs@google.com>
Reviewed-by: Dan Shi <dshi@google.com>
diff --git a/server/subcommand.py b/server/subcommand.py
index 8991653..95053d1 100644
--- a/server/subcommand.py
+++ b/server/subcommand.py
@@ -125,7 +125,6 @@
 
         self.func = func
         self.args = args
-        self.lambda_function = lambda: func(*args)
         self.pid = None
         self.returncode = None
 
@@ -178,7 +177,7 @@
         try:
             for hook in self.fork_hooks:
                 hook(self)
-            result = self.lambda_function()
+            result = self.func(*self.args)
             os.write(w, cPickle.dumps(result, cPickle.HIGHEST_PROTOCOL))
             exit_code = 0
         except Exception, e: