Remove @brief annotations from Rust API docs (#20769)

programs/bpf/rust/invoke/src/instructions.rs

@@ -1,4 +1,4 @@
-//! @brief Example Rust-based BPF program that issues a cross-program-invocation
+//! Example Rust-based BPF program that issues a cross-program-invocation
 
 pub const TEST_SUCCESS: u8 = 1;
 pub const TEST_PRIVILEGE_ESCALATION_SIGNER: u8 = 2;

programs/bpf/rust/invoke/src/lib.rs

@@ -1,4 +1,4 @@
-//! @brief Example Rust-based BPF program that issues a cross-program-invocation
+//! Example Rust-based BPF program that issues a cross-program-invocation
 
 pub mod instructions;
 pub mod processor;

programs/bpf/rust/invoke/src/processor.rs

@@ -1,4 +1,4 @@
-//! @brief Example Rust-based BPF program that issues a cross-program-invocation
+//! Example Rust-based BPF program that issues a cross-program-invocation
 
 #![cfg(feature = "program")]
 #![allow(unreachable_code)]