Fix windows build by removing sys-info (#8860)

Doesn't build for windows.

metrics/Cargo.toml

@@ -10,11 +10,11 @@ edition = "2018"
 
 [dependencies]
 env_logger = "0.7.1"
+gethostname = "0.2.1"
 lazy_static = "1.4.0"
 log = "0.4.8"
 reqwest = { version = "0.10.4", default-features = false, features = ["blocking", "rustls-tls", "json"] }
 solana-sdk = { path = "../sdk", version = "1.1.0" }
-sys-info = "0.5.10"
 
 [dev-dependencies]
 rand = "0.6.5"