check-package: fix code style

Ignore these warnings:
F401 'lib.ConsecutiveEmptyLines' imported but unused

And remove comments that are not needed anymore.

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

utils/checkpackagelib/lib_config.py

@@ -6,11 +6,10 @@
 import re
 
 from base import _CheckFunction
-# Notice: ignore 'imported but unused' from pyflakes for check functions.
-from lib import ConsecutiveEmptyLines
-from lib import EmptyLastLine
-from lib import NewlineAtEof
-from lib import TrailingSpace
+from lib import ConsecutiveEmptyLines  # noqa: F401
+from lib import EmptyLastLine          # noqa: F401
+from lib import NewlineAtEof           # noqa: F401
+from lib import TrailingSpace          # noqa: F401
 
 
 def _empty_or_comment(text):

utils/checkpackagelib/lib_hash.py

@@ -6,11 +6,10 @@
 import re
 
 from base import _CheckFunction
-# Notice: ignore 'imported but unused' from pyflakes for check functions.
-from lib import ConsecutiveEmptyLines
-from lib import EmptyLastLine
-from lib import NewlineAtEof
-from lib import TrailingSpace
+from lib import ConsecutiveEmptyLines  # noqa: F401
+from lib import EmptyLastLine          # noqa: F401
+from lib import NewlineAtEof           # noqa: F401
+from lib import TrailingSpace          # noqa: F401
 
 
 def _empty_line_or_comment(text):

utils/checkpackagelib/lib_mk.py

@@ -7,11 +7,10 @@
 import re
 
 from base import _CheckFunction
-# Notice: ignore 'imported but unused' from pyflakes for check functions.
-from lib import ConsecutiveEmptyLines
-from lib import EmptyLastLine
-from lib import NewlineAtEof
-from lib import TrailingSpace
+from lib import ConsecutiveEmptyLines  # noqa: F401
+from lib import EmptyLastLine          # noqa: F401
+from lib import NewlineAtEof           # noqa: F401
+from lib import TrailingSpace          # noqa: F401
 
 
 class Indent(_CheckFunction):

utils/checkpackagelib/lib_patch.py

@@ -6,8 +6,7 @@
 import re
 
 from base import _CheckFunction
-# Notice: ignore 'imported but unused' from pyflakes for check functions.
-from lib import NewlineAtEof
+from lib import NewlineAtEof           # noqa: F401
 
 
 class ApplyOrder(_CheckFunction):

utils/checkpackagelib/readme.txt

@@ -28,8 +28,6 @@ Some hints when changing this code:
 - when there is no other reason for ordering, use alphabetical order (e.g. keep
   the check functions in alphabetical order, keep the imports in alphabetical
   order, and so on).
-- use pyflakes to detect and fix potential problems.
-- use pep8 formatting.
 - keep in mind that for every class the method before() will be called before
   any line is served to be checked by the method check_line(). A class that
   checks the filename should only implement the method before(). A function that