Fix some imports and other checker warnings

* Removed a number of imports reported as unused.
* Reorganize imports in a few places.
* Checker reported warnings problems ("Instantiating an exception,
  but not raising it, has no effect"): serveral tool modules instantiated
  a warning class thinking (?) it would issue the warning; changed these to
  the standard use - calling the warn() function with the warnclass as an arg.
* Tool modules that were touched had the copyright header munging applied.
* Removed irritating "####" lines from gettext and msgfmt tools.

Signed-off-by: Mats Wichmann <mats@linux.com>

1 files changed, 0 insertions, 4 deletions

diff --git a/SCons/cpp.py b/SCons/cpp.py
index 65358b3..4c6b437 100644
--- a/SCons/cpp.py
+++ b/SCons/cpp.py
@@ -23,18 +23,14 @@
 
 """SCons C Pre-Processor module"""
 
-import SCons.compat
-
 import os
 import re
 
-#
 # First "subsystem" of regular expressions that we set up:
 #
 # Stuff to turn the C preprocessor directives in a file's contents into
 # a list of tuples that we can process easily.
 #
-
 # A table of regular expressions that fetch the arguments from the rest of
 # a C preprocessor line.  Different directives have different arguments
 # that we want to fetch, using the regular expressions to which the lists