Update installation instructions

docs/src/index.md

@@ -11,12 +11,7 @@ This is the documentation of the awesome `LumenManufaktur.jl` Julia package.
 `LumenManufaktur.jl` is **not an officially registered Julia package** but it's available on
 the **[KM3NeT Julia registry](https://git.km3net.de/common/julia-registry)**. To add
 the KM3NeT Julia registry to your local Julia registry list, follow the
-instructions in its
-[README](https://git.km3net.de/common/julia-registry#adding-the-registry) or simply do
-
-    git clone https://git.km3net.de/common/julia-registry ~/.julia/registries/KM3NeT
-    
-After that, you can instal `LumenManufaktur.jl` just like any other Julia package:
+instructions. After that, you can install `LumenManufaktur.jl` just like any other Julia package:
 
     julia> import Pkg; Pkg.add("LumenManufaktur")