Replace build instructions with link to devguide

Author: hoodmane

peps/pep-0776.rst

@@ -85,23 +85,9 @@ distributed via `jsDelivr <https://www.jsdelivr.com/oss-cdn/pyodide>`__, `npm
 <https://www.npmjs.com/package/pyodide>`__, and `github releases
 <https://github.com/pyodide/pyodide/releases>`__.
 
-Emscripten Python is not distributed, but it is possible to build and test by
-executing the following commands from the root of the CPython repository:
-
-.. code-block:: sh
-
-    # Install Emscripten
-    git clone emscripten/emsdk
-    ./emsdk/emsdk install 4.0.5
-    ./emsdk/emsdk activate 4.0.5
-    source ./emsdk/emsdk_env.sh
-
-    # Build
-    python3.12 ./Tools/wasm/emscripten/ build
-
-    # Run the test suite
-    ./cross-build/wasm32-emscripten/build/python/python.sh -m test
-
+Emscripten Python is not distributed, but it is possible to build `by following
+the instructions in the devguide
+<https://devguide.python.org/getting-started/setup-building/#emscripten>`__
 
 Background on Emscripten
 ------------------------