Remove unused imports throughout project

Unused imports were discovered using flake8. By removing the unused
imports, the code is a bit friendlier to new contributors as it is
clearer what is being used and not simply leftover from previous
refactoring.

The flake8 command:

$ flake8 . --select F401

http://flake8.pycqa.org/

1 files changed, 3 insertions, 6 deletions

diff --git a/examples/stateMachine2.py b/examples/stateMachine2.py
index 21e0545..a156f6c 100644
--- a/examples/stateMachine2.py
+++ b/examples/stateMachine2.py
@@ -2,7 +2,6 @@
 #

 # module to define .pystate import handler

 #

-#import imputil

 import sys

 import os

 import types

@@ -10,11 +9,9 @@ import urllib.parse
 

 DEBUG = False

 

-from pyparsing import Word, Group, ZeroOrMore, alphas, \

-    alphanums, ParserElement, ParseException, ParseSyntaxException, \

-    Empty, LineEnd, OneOrMore, col, Keyword, pythonStyleComment, \

-    StringEnd, traceParseAction

-

+from pyparsing import Word, Group, alphas, \

+    alphanums, ParseException, \

+    OneOrMore, col, Keyword, pythonStyleComment

 

 ident = Word(alphas+"_", alphanums+"_$")