feat(lib): remove stream cargo feature (#2896)

Closes #2855

Cargo.toml

@@ -27,7 +27,8 @@ futures-core = { version = "0.3", default-features = false }
 futures-channel = "0.3"
 futures-util = { version = "0.3", default-features = false }
 http = "0.2"
-http-body = "0.4"
+http-body = { git = "https://github.com/hyperium/http-body", branch = "master" }
+http-body-util = { git = "https://github.com/hyperium/http-body", branch = "master" }
 httpdate = "1.0"
 httparse = "1.6"
 h2 = { version = "0.3.9", optional = true }
@@ -80,7 +81,6 @@ full = [
     "http1",
     "http2",
     "server",
-    "stream",
     "runtime",
 ]
 
@@ -92,9 +92,6 @@ http2 = ["h2"]
 client = []
 server = []
 
-# `impl Stream` for things
-stream = []
-
 # Tokio support
 runtime = [
     "tcp",