Remove reference to Python in documentation

Author: mcbarton

docs/source/UsingXeus-Cpp.rst

@@ -4,8 +4,3 @@ Using xeus-cpp
 - With xeus-cpp, you can write and execute C++ code interactively, seeing
   the results immediately. This REPL nature allows you to iterate quickly
   without the overhead of compiling and running separate C++ programs.
-
-- To achieve C++ and Python integration within a Jupyter environment we can use
-  xeus-cpp. Thereby you can write and execute C++ code interactively in
-  this environment.
-