Update documentation on arm installation

Now ert is fully arm compatible, so this is redundant.

README.md

@@ -30,50 +30,6 @@ $ ert --help
 
 For examples and help with configuration, see the [ert Documentation](https://ert.readthedocs.io/en/latest/getting_started/configuration/poly_new/guide.html#configuration-guide).
 
-### Installing on Macs with ARM CPUs
-
-A few of ert's dependencies aren't compiled for ARM CPUs. Because of this,
-we need to do some Rosetta "hot swapping".
-
-First, install Rosetta by running `softwareupdate --install-rosetta [--agree-to-license]`
-
-Once Rosetta is installed, you can switch to an Intel based architecture by running:
-`arch -x86_64 <SHELL_PATH>`. Note that if your shell is installed
-as an ARM executable, this will error. If that's the case, you can simply pass
-`/bin/zsh` as the shell path.
-
-Now you're set to install Homebrew for Intel architectures:
-
-`/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"`
-
-Now, to be able to hot swap between Intel and ARM architectures, add the following
-to your shell profile config:
-
-```sh
-alias arm="env /usr/bin/arch -arm64 <SHELL_PATH> --login"
-alias intel="env /usr/bin/arch -x86_64 <SHELL_PATH> --login"
-
-local cpu=$(uname -m)
-
-if [[ $cpu == "arm64" ]]; then
-	eval "$(/opt/homebrew/bin/brew shellenv)"
-fi
-
-if [[ $cpu == "x86_64" ]]; then
-	eval "$(/usr/local/homebrew/bin/brew shellenv)"
-fi
-```
-
-Note: You can always check which architecture you're running by calling either
-`arch` or `uname -m`.
-
-This will allow you to switch between architectures by calling either `intel` or `arm`
-from your terminal. Switching architectures will automatically source the correct
-Hombrew executable for your architecture as well, which is key.
-
-Now, simply switch to Intel, and install Python and set up a virtualenv as
-instructed below.
-
 ## Developing
 
 ert was originally written in C/C++ but most new code is Python.