remove docs for deprecated -p option

Doc/library/2to3.rst

@@ -86,13 +86,6 @@ document could also be refactored with this option.
 The :option:`-v` option enables output of more information on the translation
 process.
 
-When the :option:`-p` is passed, the :2to3fixer:`print` fixer ``print`` as a
-function instead of a statement.  This is useful when ``from __future__ import
-print_function`` is being used.  If this option is not given, the print fixer
-will surround print calls in an extra set of parentheses because it cannot
-differentiate between the print statement with parentheses (such as ``print
-("a" + "b" + "c")``) and a true function call.
-
 
 .. _2to3-fixers: