Remove the python3 porting mode from the codebase

ChangeLog

@@ -10,6 +10,9 @@ Release date: TBA
 ..
   Put new features here and also in 'doc/whatsnew/2.11.rst'
 
+* The python3 porting mode checker and it's ``py3k`` option were removed. You can still find it in older pylint
+  versions.
+
 * Added new extension ``SetMembershipChecker`` with ``use-set-for-membership`` check:
   Emitted when using an in-place defined ``list`` or ``tuple`` to do a membership test. ``sets`` are better optimized for that.
 

doc/faq.rst

@@ -192,9 +192,7 @@ tricks like: ::
 
 pylint does have some messages disabled by default, either because
 they are prone to false positives or that they are opinionated enough
-for not being included as default messages. But most of the disabled
-messages are from the Python 3 porting checker, which is disabled by
-default. It needs special activation with the ``--py3k`` flag.
+for not being included as default messages.
 
 You can see the plugin you need to explicitly `load in the technical reference`_
 

doc/whatsnew/2.11.rst

@@ -16,6 +16,11 @@ New checkers
 
   Closes #3592
 
+Removed checkers
+================
+
+* The python3 porting mode checker and it's ``py3k`` option were removed. You can still find it in older pylint
+  versions.
 
 Extensions
 ==========

examples/pylintrc

@@ -69,85 +69,14 @@ confidence=
 # --enable=similarities". If you want to run only the classes checker, but have
 # no Warning level messages displayed, use "--disable=all --enable=classes
 # --disable=W".
-disable=print-statement,
-        parameter-unpacking,
-        unpacking-in-except,
-        old-raise-syntax,
-        backtick,
-        long-suffix,
-        old-ne-operator,
-        old-octal-literal,
-        import-star-module-level,
-        non-ascii-bytes-literal,
-        raw-checker-failed,
+disable=raw-checker-failed,
         bad-inline-option,
         locally-disabled,
         file-ignored,
         suppressed-message,
         useless-suppression,
         deprecated-pragma,
         use-symbolic-message-instead,
-        apply-builtin,
-        basestring-builtin,
-        buffer-builtin,
-        cmp-builtin,
-        coerce-builtin,
-        execfile-builtin,
-        file-builtin,
-        long-builtin,
-        raw_input-builtin,
-        reduce-builtin,
-        standarderror-builtin,
-        unicode-builtin,
-        xrange-builtin,
-        coerce-method,
-        delslice-method,
-        getslice-method,
-        setslice-method,
-        no-absolute-import,
-        old-division,
-        dict-iter-method,
-        dict-view-method,
-        next-method-called,
-        metaclass-assignment,
-        indexing-exception,
-        raising-string,
-        reload-builtin,
-        oct-method,
-        hex-method,
-        nonzero-method,
-        cmp-method,
-        input-builtin,
-        round-builtin,
-        intern-builtin,
-        unichr-builtin,
-        map-builtin-not-iterating,
-        zip-builtin-not-iterating,
-        range-builtin-not-iterating,
-        filter-builtin-not-iterating,
-        using-cmp-argument,
-        eq-without-hash,
-        div-method,
-        idiv-method,
-        rdiv-method,
-        exception-message-attribute,
-        invalid-str-codec,
-        sys-max-int,
-        bad-python3-import,
-        deprecated-string-function,
-        deprecated-str-translate-call,
-        deprecated-itertools-function,
-        deprecated-types-field,
-        next-method-defined,
-        dict-items-not-iterating,
-        dict-keys-not-iterating,
-        dict-values-not-iterating,
-        deprecated-operator-function,
-        deprecated-urllib-function,
-        xreadlines-attribute,
-        deprecated-sys-function,
-        exception-escape,
-        comprehension-escape
 
 # Enable the message, report, category or checker with the given id(s). You can
 # either give multiple identifier separated by comma (,) or put this option