Fixes for rust nightly change to behavior of no_std[1]

[1]rust-lang/rfcs#1184

Author: mokus0

examples/blink_k20/src/main.rs

@@ -2,7 +2,6 @@
 #![no_std]
 #![plugin(macro_zinc)]
 
-extern crate core;
 extern crate zinc;
 
 use core::option::Option::Some;

examples/blink_k20_isr/src/main.rs

@@ -1,7 +1,6 @@
 #![feature(no_std, core, start, core_intrinsics)]
 #![no_std]
 
-extern crate core;
 extern crate zinc;
 
 use core::intrinsics::volatile_load;

examples/blink_lpc17xx/src/main.rs

@@ -2,7 +2,6 @@
 #![no_std]
 #![plugin(macro_zinc)]
 
-extern crate core;
 extern crate zinc;
 
 use core::option::Option::Some;

examples/blink_pt/src/main.rs

@@ -2,7 +2,6 @@
 #![no_std]
 #![plugin(macro_platformtree)]
 
-extern crate core;
 extern crate zinc;
 
 platformtree!(

examples/blink_stm32f4/src/main.rs

@@ -2,7 +2,6 @@
 #![no_std]
 #![plugin(macro_zinc)]
 
-extern crate core;
 extern crate zinc;
 
 use zinc::hal::timer::Timer;

examples/blink_stm32l1/src/main.rs

@@ -2,7 +2,6 @@
 #![no_std]
 #![plugin(macro_zinc)]
 
-extern crate core;
 extern crate zinc;
 
 #[zinc_main]

examples/blink_tiva_c/src/main.rs

@@ -2,7 +2,6 @@
 #![no_std]
 #![plugin(macro_platformtree)]
 
-extern crate core;
 extern crate zinc;
 
 platformtree!(

examples/bluenrg_stm32l1/src/main.rs

@@ -4,7 +4,6 @@
 //! Sample application for BlueNRG communication over SPI in X-NUCLEO-IDB04A1
 //! extension board for NUCLEO-L152RE
 
-#[macro_use] extern crate core;
 extern crate zinc;
 
 use core::intrinsics::abort;

examples/dht22/src/main.rs

@@ -3,7 +3,6 @@
 #![no_std]
 #![plugin(macro_platformtree)]
 
-extern crate core;
 extern crate zinc;
 #[macro_use] #[no_link] extern crate macro_platformtree;
 

examples/empty/src/main.rs

@@ -2,7 +2,6 @@
 #![no_std]
 #![plugin(macro_zinc)]
 
-extern crate core;
 extern crate zinc;
 
 use zinc::hal::mem_init::{init_data, init_stack};

examples/lcd_tiva_c/src/main.rs

@@ -3,7 +3,6 @@
 #![no_std]
 #![plugin(macro_platformtree)]
 
-extern crate core;
 extern crate zinc;
 #[macro_use] #[no_link] extern crate macro_platformtree;
 

examples/uart/src/main.rs

@@ -3,7 +3,6 @@
 #![no_std]
 #![plugin(macro_platformtree)]
 
-extern crate core;
 extern crate zinc;
 #[macro_use] #[no_link] extern crate macro_platformtree;
 

examples/uart_tiva_c/src/main.rs

@@ -3,7 +3,6 @@
 #![no_std]
 #![plugin(macro_platformtree)]
 
-extern crate core;
 extern crate zinc;
 #[macro_use] #[no_link] extern crate macro_platformtree;
 

examples/usart_stm32l1/src/main.rs

@@ -2,7 +2,6 @@
 #![no_std]
 #![plugin(macro_zinc)]
 
-extern crate core;
 extern crate zinc;
 
 #[zinc_main]

ioreg/tests/test.rs

@@ -18,7 +18,6 @@
 #![feature(core, plugin)]
 #![plugin(ioreg)]
 
-extern crate core;
 extern crate volatile_cell;
 
 #[cfg(test)]

src/lib.rs

@@ -48,7 +48,6 @@ STM32F403/407).
 #![plugin(ioreg)]
 #![feature(no_std)]
 
-#[macro_use] extern crate core;
 #[cfg(target_os = "none")]
 extern crate rlibc;
 

src/util/app.rs

@@ -20,7 +20,6 @@
 #![crate_type="staticlib"]
 #![no_std]
 
-extern crate core;
 extern crate zinc;
 extern crate app;
 

volatile_cell/lib.rs

@@ -15,10 +15,9 @@
 
 //! A cell that with volatile setter and getter.
 
-#![feature(core, no_std, core_intrinsics)]
+#![feature(no_std, core_intrinsics)]
 #![no_std]
 
-extern crate core;
 
 #[cfg(feature="replayer")] #[macro_use(expect)] extern crate expectest;
 #[cfg(feature="replayer")] #[macro_use] extern crate std;