Remove unused nohup() method.

Change-Id: Ib712176b86d6bbc97c8da64d7578f5b402fbb214
Reviewed-on: https://chromium-review.googlesource.com/572793
Commit-Ready: Justin TerAvest <teravest@chromium.org>
Tested-by: Justin TerAvest <teravest@chromium.org>
Reviewed-by: Dan Erat <derat@chromium.org>
diff --git a/server/base_utils.py b/server/base_utils.py
index 255d355..8b64300 100644
--- a/server/base_utils.py
+++ b/server/base_utils.py
@@ -188,20 +188,6 @@
     return None
 
 
-def nohup(command, stdout='/dev/null', stderr='/dev/null', background=True,
-                                                                env = {}):
-    cmd = ' '.join(key+'='+val for key, val in env.iteritems())
-    cmd += ' nohup ' + command
-    cmd += ' > %s' % stdout
-    if stdout == stderr:
-        cmd += ' 2>&1'
-    else:
-        cmd += ' 2> %s' % stderr
-    if background:
-        cmd += ' &'
-    utils.system(cmd)
-
-
 def default_mappings(machines):
     """
     Returns a simple mapping in which all machines are assigned to the