Remove some unused imports.

Remove the log file after we are done with it.  This should clean up after
the test even on Windows, since the file is now closed before we attempt
removal.

Lib/test/test_hotshot.py

@@ -2,9 +2,7 @@ import hotshot
 import hotshot.log
 import os
 import pprint
-import sys
 import unittest
-import warnings
 
 import test_support
 
@@ -21,14 +19,29 @@ def shortfilename(fn):
         return fn
 
 
+class UnlinkingLogReader(hotshot.log.LogReader):
+    """Extend the LogReader so the log file is unlinked when we're
+    done with it."""
+
+    def __init__(self, logfn):
+        self.__logfn = logfn
+        hotshot.log.LogReader.__init__(self, logfn)
+
+    def next(self, index=None):
+        try:
+            return hotshot.log.LogReader.next(self)
+        except (IndexError, StopIteration):
+            os.unlink(self.__logfn)
+            raise
+
+
 class HotShotTestCase(unittest.TestCase):
     def new_profiler(self, lineevents=0, linetimings=1):
         self.logfn = test_support.TESTFN
         return hotshot.Profile(self.logfn, lineevents, linetimings)
 
     def get_logreader(self):
-        log = hotshot.log.LogReader(self.logfn)
-        #XXX os.unlink(self.logfn)
+        log = UnlinkingLogReader(self.logfn)
         return log
 
     def get_events_wotime(self):