Drop subclassing support

.cirrus.yml

@@ -115,5 +115,5 @@ Windows_task:
     - C:\Python\python.exe --version
     - C:\Python\python.exe -m pip list
 
-    - C:\Python\python.exe -m doctest README.md
+    - C:\Python\python.exe -m doctest README.md ppb_vector/__init__.py
     - C:\Python\python.exe -m pytest --hypothesis-profile ci

README.md

@@ -1,24 +1,24 @@
 # ppb-vector
 The immutable, 2D vector class for the PursuedPyBear project.
 
-`Vector2` implements many convenience features, as well as
+`Vector` implements many convenience features, as well as
 useful mathematical operations for 2D geometry.
 
 ## Install
 
-You can install `Vector2` pip package using
+You can install `Vector` pip package using
 
 ```bash
 pip install 'ppb-vector'
 ```
 
 ## Usage
 
-`Vector2` is an immutable 2D Vector. Instantiated as expected: 
+`Vector` is an immutable 2D Vector. Instantiated as expected: 
 
-    >>> from ppb_vector import Vector2
-    >>> Vector2(3, 4)
-    Vector2(3.0, 4.0)
+    >>> from ppb_vector import Vector
+    >>> Vector(3, 4)
+    Vector(3.0, 4.0)
 
 
 See the [online documentation] for an overview of the functionality.

docs/index.rst

@@ -1,17 +1,7 @@
 PPB's 2D Vector class
 =====================
 
-.. py:data:: ppb_vector.vector2.Vector
-    :annotation: = typing.TypeVar('Vector', bound='Vector2')
-
-    In the following, :py:data:`Vector` is a type variable (an instance of
-    :py:class:`TypeVar <typing.TypeVar>`) that denotes either
-    :py:class:`Vector2` or any of its subclasses. Implicitely, it is the type of
-    ``self``: a method whose return type is :py:data:`Vector` will return a
-    vector of the same type that it was called on.
-
-
-.. autoclass:: ppb_vector.Vector2
+.. autoclass:: ppb_vector.Vector
    :members:
    :special-members:
    :exclude-members: __init__, __repr__, __weakref__, scale
@@ -25,3 +15,9 @@ PPB's 2D Vector class
         :annotation: : float
 
         The Y coordinate of the vector
+
+
+Inheriting from :py:class:`Vector`
+-----------------------------------
+
+:py:class:`Vector` does not support inheritance.