Update to the latest tokio

We were pinning to an ancient version of tokio because of allegged
issues with RPC and the io loop. We've merged
anza-xyz#3242 which should improve the io
loop situation with RPCs.

Update to tokio so we finally pick up
tokio-rs/tokio#6512 which fixes bad perf for
timeouts.

Cargo.toml

@@ -652,7 +652,7 @@ test-case = "3.3.1"
 thiserror = "2.0.9"
 tiny-bip39 = "0.8.2"
 # Update solana-tokio patch below when updating this version
-tokio = "1.29.1"
+tokio = "1.43.0"
 tokio-serde = "0.8"
 tokio-stream = "0.1.17"
 tokio-tungstenite = "0.20.1"
@@ -736,21 +736,3 @@ solana-zk-sdk = { path = "zk-sdk" }
 # we override the opt-level to 3 for the crate.
 [profile.dev.package.curve25519-dalek]
 opt-level = 3
-
-# Solana RPC nodes experience stalls when running with `tokio` containing this
-# commit:
-# https://github.com/tokio-rs/tokio/commit/4eed411519783ef6f58cbf74f886f91142b5cfa6
-#
-# Tokio maintainers believe performance degradation is due to application bugs:
-# https://github.com/tokio-rs/tokio/issues/4873#issuecomment-1198277677
-#
-# This may indeed be true of the code in this monorepo, but we haven't yet
-# identified the bug or a way to fix. As a stopgap, this patches `tokio` to the
-# tagged version specified above with commit `4eed411` reverted.
-#
-# Comparison:
-# https://github.com/tokio-rs/tokio/compare/tokio-1.29.1...solana-labs:solana-tokio:tokio-1.29.1-revert-4eed411
-#
-[patch.crates-io.tokio]
-git = "https://github.com/anza-xyz/solana-tokio.git"
-rev = "7cf47705faacf7bf0e43e4131a5377b3291fce21"