Remove some unused files related to WASM/WASI (GH-124635)

Author: brettcannon

Tools/wasm/Setup.local.example

@@ -1,6 +1,8 @@
 #!/bin/sh
 set -e
 
+# NOTE: to be removed once no longer used in https://github.com/python/buildmaster-config/blob/main/master/custom/factories.py .
+
 # function
 usage() {
     echo "wasi-env - Run command with WASI-SDK"