dchat: removed unused imports from Cargo.toml

example/dchat/Cargo.toml

@@ -10,7 +10,6 @@ description = "Demo chat to document darkfi net code"
 darkfi = {path = "../../", features = ["net", "rpc"]}
 
 # Async
-futures = "0.3.0"
 async-std = "1"
 async-trait = "0.1.56"
 async-executor = "1.4.1"
@@ -22,15 +21,11 @@ num_cpus = "1.13.1"
 # Misc
 log = "0.4.17"
 simplelog = "0.12.0"
-ringbuffer = "0.8.4"
 url = "2.2.2"
-clap = {version = "3.2.8", features = ["derive"]}
 termion = "1.5.6"
 
 # Encoding and parsing
 serde = {version = "1.0.138", features = ["derive"]}
-structopt = "0.3.26"
-structopt-toml = "0.5.0"
 toml = "0.4.2"