rustc_target: Remove some useless imports

src/librustc_target/spec/armebv7r_none_eabi.rs

@@ -1,7 +1,6 @@
 // Targets the Big endian Cortex-R4/R5 processor (ARMv7-R)
 
 use crate::spec::{LinkerFlavor, LldFlavor, PanicStrategy, Target, TargetOptions, TargetResult};
-use std::default::Default;
 
 pub fn target() -> TargetResult {
     Ok(Target {

src/librustc_target/spec/armebv7r_none_eabihf.rs

@@ -1,7 +1,6 @@
 // Targets the Cortex-R4F/R5F processor (ARMv7-R)
 
 use crate::spec::{LinkerFlavor, LldFlavor, PanicStrategy, Target, TargetOptions, TargetResult};
-use std::default::Default;
 
 pub fn target() -> TargetResult {
     Ok(Target {

src/librustc_target/spec/armv7r_none_eabi.rs

@@ -1,7 +1,6 @@
 // Targets the Little-endian Cortex-R4/R5 processor (ARMv7-R)
 
 use crate::spec::{LinkerFlavor, LldFlavor, PanicStrategy, Target, TargetOptions, TargetResult};
-use std::default::Default;
 
 pub fn target() -> TargetResult {
     Ok(Target {

src/librustc_target/spec/armv7r_none_eabihf.rs

@@ -1,7 +1,6 @@
 // Targets the Little-endian Cortex-R4F/R5F processor (ARMv7-R)
 
 use crate::spec::{LinkerFlavor, LldFlavor, PanicStrategy, Target, TargetOptions, TargetResult};
-use std::default::Default;
 
 pub fn target() -> TargetResult {
     Ok(Target {

src/librustc_target/spec/dragonfly_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, RelroLevel, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let mut args = LinkArgs::new();

src/librustc_target/spec/freebsd_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, RelroLevel, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let mut args = LinkArgs::new();

src/librustc_target/spec/fuchsia_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, LldFlavor, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let mut pre_link_args = LinkArgs::new();

src/librustc_target/spec/haiku_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{RelroLevel, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     TargetOptions {

src/librustc_target/spec/hermit_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, LldFlavor, PanicStrategy, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let mut pre_link_args = LinkArgs::new();

src/librustc_target/spec/hermit_kernel_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, LldFlavor, PanicStrategy, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let mut pre_link_args = LinkArgs::new();

src/librustc_target/spec/l4re_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, PanicStrategy, TargetOptions};
-use std::default::Default;
 //use std::process::Command;
 
 // Use GCC to locate code for crt* libraries from the host, not from L4Re. Note

src/librustc_target/spec/linux_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, RelroLevel, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let mut args = LinkArgs::new();

src/librustc_target/spec/linux_kernel_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, PanicStrategy, RelroLevel, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let mut pre_link_args = LinkArgs::new();

src/librustc_target/spec/mod.rs

@@ -37,7 +37,6 @@
 use crate::spec::abi::{lookup as lookup_abi, Abi};
 use rustc_serialize::json::{Json, ToJson};
 use std::collections::BTreeMap;
-use std::default::Default;
 use std::path::{Path, PathBuf};
 use std::str::FromStr;
 use std::{fmt, io};

src/librustc_target/spec/netbsd_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, RelroLevel, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let mut args = LinkArgs::new();

src/librustc_target/spec/openbsd_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, RelroLevel, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let mut args = LinkArgs::new();

src/librustc_target/spec/redox_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, RelroLevel, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let mut args = LinkArgs::new();

src/librustc_target/spec/solaris_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::TargetOptions;
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     TargetOptions {

src/librustc_target/spec/thumb_base.rs

@@ -28,7 +28,6 @@
 // build scripts / gcc flags.
 
 use crate::spec::{PanicStrategy, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     // See rust-lang/rfcs#1645 for a discussion about these defaults

src/librustc_target/spec/uefi_msvc_base.rs

@@ -10,7 +10,6 @@
 // code runs in the same environment, no process separation is supported.
 
 use crate::spec::{LinkArgs, LinkerFlavor, LldFlavor, PanicStrategy, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let pre_link_args_msvc = vec![

src/librustc_target/spec/vxworks_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let mut args_crt = LinkArgs::new();

src/librustc_target/spec/windows_gnu_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let mut pre_link_args = LinkArgs::new();

src/librustc_target/spec/windows_msvc_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, LldFlavor, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let pre_link_args_msvc = vec!["/NOLOGO".to_string(), "/NXCOMPAT".to_string()];

src/librustc_target/spec/windows_uwp_gnu_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let mut pre_link_args = LinkArgs::new();

src/librustc_target/spec/windows_uwp_msvc_base.rs

@@ -1,5 +1,4 @@
 use crate::spec::{LinkArgs, LinkerFlavor, LldFlavor, TargetOptions};
-use std::default::Default;
 
 pub fn opts() -> TargetOptions {
     let pre_link_args_msvc = vec![