Remove environment-wasm-build.yml from README.md

Author: mcbarton

README.md

@@ -69,13 +69,6 @@ git clone --depth=1 https://github.com/compiler-research/xeus-cpp.git
 cd ./xeus-cpp
 ```
 
-Now you'll want to create a clean mamba environment containing the tools you'll need to do a wasm build. This can be done by executing 
-the following
-```bash
-micromamba create -f environment-wasm-build.yml -y
-micromamba activate xeus-cpp-wasm-build
-```
-
 You'll now want to make sure you're using emsdk version "3.1.45" and activate it. You can get this by executing the following
 ```bash
 cd $HOME