Remove reqwest dependency from gpui (#44424)

This was pulling in tokio which is pretty unfortunate. The solution is
to do the `reqwest::Form` to `http::Reqwest` conversion in the
reliability crate instead of our http client wrapper.

Release Notes:

- N/A

crates/http_client/src/async_body.rs

@@ -88,17 +88,6 @@ impl From<&'static str> for AsyncBody {
     }
 }
 
-impl TryFrom<reqwest::Body> for AsyncBody {
-    type Error = anyhow::Error;
-
-    fn try_from(value: reqwest::Body) -> Result<Self, Self::Error> {
-        value
-            .as_bytes()
-            .ok_or_else(|| anyhow::anyhow!("Underlying data is a stream"))
-            .map(|bytes| Self::from_bytes(Bytes::copy_from_slice(bytes)))
-    }
-}
-
 impl<T: Into<Self>> From<Option<T>> for AsyncBody {
     fn from(body: Option<T>) -> Self {
         match body {

crates/http_client/src/http_client.rs

@@ -8,10 +8,7 @@ use derive_more::Deref;
 use http::HeaderValue;
 pub use http::{self, Method, Request, Response, StatusCode, Uri, request::Builder};
 
-use futures::{
-    FutureExt as _,
-    future::{self, BoxFuture},
-};
+use futures::future::BoxFuture;
 use parking_lot::Mutex;
 use serde::Serialize;
 use std::sync::Arc;
@@ -110,14 +107,6 @@ pub trait HttpClient: 'static + Send + Sync {
     fn as_fake(&self) -> &FakeHttpClient {
         panic!("called as_fake on {}", type_name::<Self>())
     }
-
-    fn send_multipart_form<'a>(
-        &'a self,
-        _url: &str,
-        _request: reqwest::multipart::Form,
-    ) -> BoxFuture<'a, anyhow::Result<Response<AsyncBody>>> {
-        future::ready(Err(anyhow!("not implemented"))).boxed()
-    }
 }
 
 /// An [`HttpClient`] that may have a proxy.
@@ -165,14 +154,6 @@ impl HttpClient for HttpClientWithProxy {
     fn as_fake(&self) -> &FakeHttpClient {
         self.client.as_fake()
     }
-
-    fn send_multipart_form<'a>(
-        &'a self,
-        url: &str,
-        form: reqwest::multipart::Form,
-    ) -> BoxFuture<'a, anyhow::Result<Response<AsyncBody>>> {
-        self.client.send_multipart_form(url, form)
-    }
 }
 
 /// An [`HttpClient`] that has a base URL.
@@ -306,14 +287,6 @@ impl HttpClient for HttpClientWithUrl {
     fn as_fake(&self) -> &FakeHttpClient {
         self.client.as_fake()
     }
-
-    fn send_multipart_form<'a>(
-        &'a self,
-        url: &str,
-        request: reqwest::multipart::Form,
-    ) -> BoxFuture<'a, anyhow::Result<Response<AsyncBody>>> {
-        self.client.send_multipart_form(url, request)
-    }
 }
 
 pub fn read_proxy_from_env() -> Option<Url> {