Remove redundant exception handling in postgresql module

If we pass a 'None' into shutil.rmtree() it will os.path.join() that
with a string leading to a TypeError:

Traceback (most recent call last):
  File "/usr/sbin/sosreport", line 23, in <module>
    main(sys.argv[1:])
  File "/usr/lib/python2.7/site-packages/sos/sosreport.py", line 961, in main
    sos.execute()
TypeError: coercing to Unicode: need string or buffer, NoneType found

> /usr/lib64/python2.7/posixpath.py(133)islink()
-> st = os.lstat(path)

Rather than catch the exception test tmp_dir before calling rmtree.

1 files changed, 1 insertions, 5 deletions

diff --git a/sos/plugins/postgresql.py b/sos/plugins/postgresql.py
index 62fdcbec..6a999f45 100644
--- a/sos/plugins/postgresql.py
+++ b/sos/plugins/postgresql.py
@@ -57,9 +57,5 @@ class postgresql(Plugin, RedHatPlugin):
 
     def postproc(self):
         import shutil
-        if self.tmp_dir == None:
-            return
-        try:
+        if self.tmp_dir:
             shutil.rmtree(self.tmp_dir)
-        except:
-            pass