remove "if available" from readme (#41)

Author: phunehehe

README.md

@@ -9,8 +9,7 @@ GrpcReflection, implemented as a gRPC server using `grpc-elixir`, adds reflectio
 
 ## Installation
 
-If [available in Hex](https://hex.pm/docs/publish), the package can be installed
-by adding `grpc_reflection` to your list of dependencies in `mix.exs`:
+The package can be installed by adding `grpc_reflection` to your list of dependencies in `mix.exs`:
 
 ```elixir
 def deps do
@@ -98,4 +97,4 @@ This is **not** an exhaustive list, contributions are appreciated.
 | Application  | Reflection version required |
 | ------------- | ------------- |
 | grpcurl  | V1  |
-| postman | V1alpha  |
+| postman | V1alpha  |