docs: remove Python 2 reference

CHANGELOG

@@ -1,3 +1,5 @@
+0.4.1
+ - docs: remove Python 2 reference
 0.4.0
  - ref: support NumPy 2
  - setup: migrate to GitHub Actions

README.rst

@@ -10,9 +10,9 @@ correlation on a linear scale such as `numpy.correlate <http://docs.scipy.org/do
 
 Installation
 ------------
-Multipletau supports Python 2.7 and Python 3.3+ with a common codebase.
-The only requirement for ``multipletau`` is `NumPy <http://www.numpy.org/>`__ (for fast
-operations on arrays). Install multipletau from the Python package index:
+The only requirement for ``multipletau`` is Python 3.x and
+`NumPy <http://www.numpy.org/>`__. Install multipletau from the
+Python package index:
 
 ::
 
@@ -22,7 +22,8 @@ operations on arrays). Install multipletau from the Python package index:
 Documentation
 -------------
 
-The documentation, including the reference and examples, is available on `readthedocs.io <https://multipletau.readthedocs.io/en/stable/>`__.
+The documentation, including the reference and examples, is available
+on `readthedocs.io <https://multipletau.readthedocs.io/en/stable/>`__.
 
 
 Usage

multipletau/__init__.py

@@ -1,8 +1,8 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 u"""
-Multipletau provides a multiple-τ algorithm for Python 2.7 and
-Python 3.x with :py:mod:`numpy` as its sole dependency.
+Multipletau provides a multiple-τ algorithm Python 3.x with
+:py:mod:`numpy` as its sole dependency.
 
 Multiple-τ correlation is computed on a logarithmic scale (less
 data points are computed) and is thus much faster than conventional