Extract http from util (#11680)

This avoids the CLI linking libssl etc...

Release Notes:

- N/A

crates/util/src/util.rs

@@ -1,7 +1,5 @@
 pub mod arc_cow;
 pub mod fs;
-pub mod github;
-pub mod http;
 pub mod paths;
 pub mod serde;
 #[cfg(any(test, feature = "test-support"))]
@@ -43,28 +41,6 @@ pub fn truncate(s: &str, max_chars: usize) -> &str {
     }
 }
 
-pub fn http_proxy_from_env() -> Option<isahc::http::Uri> {
-    macro_rules! try_env {
-        ($($env:literal),+) => {
-            $(
-                if let Ok(env) = std::env::var($env) {
-                    return env.parse::<isahc::http::Uri>().ok();
-                }
-            )+
-        };
-    }
-
-    try_env!(
-        "ALL_PROXY",
-        "all_proxy",
-        "HTTPS_PROXY",
-        "https_proxy",
-        "HTTP_PROXY",
-        "http_proxy"
-    );
-    None
-}
-
 /// Removes characters from the end of the string if its length is greater than `max_chars` and
 /// appends "..." to the string. Returns string unchanged if its length is smaller than max_chars.
 pub fn truncate_and_trailoff(s: &str, max_chars: usize) -> String {