[deps] cleanup unused dep reqwest. (starcoinorg#2971)

Author: jolestar

Cargo.lock

@@ -17,7 +17,6 @@ futures = "0.3.12"
 bcs-ext = { package="bcs-ext", path = "../../commons/bcs_ext" }
 structopt = "0.3.25"
 itertools = "0.10.1"
-reqwest = "0.11.5"
 
 starcoin-logger = { path = "../../commons/logger" }
 starcoin-config = { path = "../../config"}