Remove unused imports. (nw)

src/build/file2str.py

@@ -2,7 +2,6 @@
 
 from __future__ import with_statement
 
-import string
 import sys
 import os
 

src/build/png.py

@@ -2660,7 +2660,6 @@ def _main(argv):
 
     # Parse command line arguments
     from optparse import OptionParser
-    import re
     version = '%prog ' + __version__
     parser = OptionParser(version=version)
     parser.set_usage("%prog [options] [imagefile]")

src/emu/cpu/arcompact/arcompact_make.py

@@ -1,7 +1,6 @@
 #!/usr/bin/python
 
 import sys
-import re
 
 def EmitGroup04_Handle_NZ_Flags(f, funcname, opname):
         print >>f, "		if (result & 0x80000000) { STATUS32_SET_N; }"

src/emu/cpu/m6809/m6809make.py

@@ -1,8 +1,6 @@
 #!/usr/bin/python
 
 import sys
-import logging
-import fileinput
 import re
 
 # Initial state