docs/manual/adding-packages-python.txt: drop <pkg>_NEEDS_HOST_PYTHON

Now that host-python2 is gone and the corresponding logic in pkg-python.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

docs/manual/adding-packages-python.txt

@@ -141,13 +141,6 @@ therefore only use a few of them, or none.
   packages) and +HOST_PKG_PYTHON_SETUPTOOLS_INSTALL_OPTS+ (for host
   setuptools packages).
 
-* +HOST_PYTHON_FOO_NEEDS_HOST_PYTHON+, to define the host python
-  interpreter. The usage of this variable is limited to host
-  packages. The two supported value are +python2+ and +python3+. It
-  will ensure the right host python package is available and will
-  invoke it for the build. If some build steps are overloaded, the
-  right python interpreter must be explicitly called in the commands.
-
 With the Python infrastructure, all the steps required to build and
 install the packages are already defined, and they generally work well
 for most Python-based packages. However, when required, it is still