Fix FnDef tests and remove macro_use lazy static

Author: jackh726

chalk-ir/src/debug_macros.rs

@@ -1,6 +1,6 @@
 use std::cell::RefCell;
 
-lazy_static! {
+lazy_static::lazy_static! {
     pub static ref DEBUG_ENABLED: bool = {
         use std::env;
         env::var("CHALK_DEBUG")

chalk-ir/src/lib.rs

@@ -1,8 +1,5 @@
 #![deny(rust_2018_idioms)]
 
-#[macro_use]
-extern crate lazy_static;
-
 // Allows macros to refer to this crate as `::chalk_ir`
 extern crate self as chalk_ir;
 

tests/test/fn_def.rs

@@ -35,7 +35,7 @@ fn fn_def_is_sized() {
 fn fn_def_is_copy() {
     test! {
         program {
-            #[lang(sized)]
+            #[lang(copy)]
             trait Copy { }
 
             fn foo() {}
@@ -52,7 +52,7 @@ fn fn_def_is_copy() {
 fn fn_def_is_clone() {
     test! {
         program {
-            #[lang(sized)]
+            #[lang(clone)]
             trait Clone { }
 
             fn foo() {}