reduced binary size and disabled breakage from panic_impl

src/lib.rs

@@ -7,20 +7,13 @@
  */
 
 #![no_std]
-#![feature(core_intrinsics, lang_items, start)]
 #![allow(non_upper_case_globals)]
 #![allow(non_camel_case_types)]
 #![allow(non_snake_case)]
 
 include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
 
-#[lang = "eh_personality"]
-#[no_mangle]
-fn rust_eh_personality() {}
-
-#[lang = "panic_impl"]
-#[no_mangle]
-fn panic(_: &core::panic::PanicInfo) -> ! { core::intrinsics::abort() }
+extern crate core;
 
 #[no_mangle]
 pub fn exit(code: u32) -> ! {