addressed some warning

Author: majabbour

program/rust/build.rs

@@ -1,6 +1,5 @@
 mod build_utils;
 use bindgen::Builder;
-use std::vec::Vec;
 
 fn main() {
     println!("cargo:rustc-link-search=../c/target");

program/rust/src/lib.rs

@@ -3,8 +3,6 @@ mod rust_oracle;
 mod time_machine_types;
 use borsh::{BorshDeserialize, BorshSerialize};
 use solana_program::entrypoint::deserialize;
-use solana_program::pubkey::Pubkey;
-use solana_program::sysvar::slot_history::AccountInfo;
 
 //Below is a high lever description of the rust/c setup.