Remove extraneous installation step in README.md (#265)

Author: reillysiemens

README.md

@@ -33,15 +33,6 @@ provide a means of downloading the latest release, so you **must** specify your
 
 To install the application, run
 
-```powershell
-# 0.7.4 is an example. See https://github.com/AzureAD/microsoft-authentication-cli/releases for the latest.
-$env:AZUREAUTH_VERSION = '0.7.4'
-[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
-iex "& { $(irm https://raw.githubusercontent.com/AzureAD/microsoft-authentication-cli/${env:AZUREAUTH_VERSION}/install/install.ps1) } -Verbose"
-```
-
-Or, if you want a method more resilient to failure than `Invoke-Expression`, run
-
 ```powershell
 # 0.7.4 is an example. See https://github.com/AzureAD/microsoft-authentication-cli/releases for the latest.
 $env:AZUREAUTH_VERSION = '0.7.4'