Drop default-features for reqwest

While we previously enabled `rustls` support for `reqwest`, we forgot to
disable `default-features`, meaning we'd also build with `reqwest`'s
`default-tls` feature, which is huge and can lead for issues on
downstream projects:

`default-tls = ["hyper-tls", "native-tls-crate", "__tls",
"tokio-native-tls"]`

Here, we therefore disable `default-features`.

Author: tnull

Cargo.toml

@@ -13,13 +13,13 @@ build = "build.rs"
 
 [dependencies]
 prost = "0.11.6"
-reqwest = { version = "0.11.13", features = ["rustls-tls"] }
+reqwest = { version = "0.11.13", default-features = false, features = ["rustls-tls"] }
 tokio = { version = "1", default-features = false, features = ["time"] }
 rand = "0.8.5"
 
 [target.'cfg(genproto)'.build-dependencies]
 prost-build = { version = "0.11.3" }
-reqwest =  { version = "0.11.13", features = ["blocking"] }
+reqwest =  { version = "0.11.13", default-features = false, features = ["rustls-tls", "blocking"] }
 
 [dev-dependencies]
 mockito = "0.31.1"