simplified installation instruction as it is now officially registered

Author: Stephan Sahm

README.md

@@ -13,8 +13,6 @@ This package defines julia implementations for the common types `Option` (aka `M
 The package is soon going to be registered at General, until then you can use it by adding a custom registry.
 ```julia
 using Pkg
-pkg"registry add https://github.com/JuliaRegistries/General"  # central julia registry
-pkg"registry add https://github.com/schlichtanders/SchlichtandersJuliaRegistry.jl"  # custom registry
 pkg"add DataTypesBasic"
 ```
 

docs/src/index.md

@@ -7,8 +7,6 @@ This package defines julia implementations for the common types `Option` (aka `M
 
 ```julia
 using Pkg
-pkg"registry add https://github.com/JuliaRegistries/General"  # central julia registry
-pkg"registry add https://github.com/schlichtanders/SchlichtandersJuliaRegistry.jl"  # custom registry
 pkg"add DataTypesBasic"
 ```