SF #1062190. Removed an assertion that rendered trace.py unnecessarily

inflexibile.

Lib/trace.py

@@ -416,7 +416,6 @@ def find_strings(filename):
 
 def find_executable_linenos(filename):
     """Return dict where keys are line numbers in the line number table."""
-    assert filename.endswith('.py')
     try:
         prog = open(filename, "rU").read()
     except IOError, err: