rust: Update futures to 0.3.34

Change-Id: I9c96714c775daeac830075b456c531a06a6a6964
Reviewed-on: https://bluetooth-review.googlesource.com/c/bluetooth/+/4180

rust/Cargo.toml

diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index a9f1a7d..4fadabe 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -29,9 +29,8 @@
 assert_matches = "1.5.0"
 bitfield = "0.19.4"
 bitflags = "2.11.1"
-futures = "=0.3.31"
-futures-channel = "=0.3.31"
-futures-test = "=0.3.31"
+futures = "=0.3.34"
+futures-test = "=0.3.34"
 log = { version = "0.4.29", features = ["kv", "std"] }
 num = { version = "0.4.3", features = ["rand"] }
 parking_lot = "0.12.5"

rust/bt-mcs/Cargo.toml

diff --git a/rust/bt-mcs/Cargo.toml b/rust/bt-mcs/Cargo.toml
index 70e351c..3ada3f7 100644
--- a/rust/bt-mcs/Cargo.toml
+++ b/rust/bt-mcs/Cargo.toml
@@ -16,4 +16,3 @@
 [dev-dependencies]
 assert_matches.workspace = true
 bt-gatt = { workspace = true, features = ["test-utils"] }
-futures-channel.workspace = true