removing old exmaple

internal/grpc/doc.go

@@ -5,33 +5,6 @@ The client connects to a drand gRPC endpoint to fetch randomness. The gRPC
 client has some advantages over the HTTP client - it is more compact
 on-the-wire and supports streaming and authentication.
 
-Example:
-
-	package main
-
-	import (
-		"encoding/hex"
-
-		"github.com/drand/drand/v2/client"
-		"github.com/drand/drand/v2/client/grpc"
-	)
-
-	const (
-		grpcAddr = "example.drand.grpc.server:4444"
-		certPath = "/path/to/drand-grpc.cert"
-	)
-
-	var chainHash, _ = hex.DecodeString("8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce")
-
-	func main() {
-		gc, err := grpc.New(grpcAddr, certPath, false)
-
-		c, err := client.New(
-			client.From(gc),
-			client.WithChainHash(chainHash),
-		)
-	}
-
 A path to a file that holds TLS credentials for the drand server is required
 to validate server connections. Alternatively set the final parameter to
 `true` to enable _insecure_ connections (not recommended).