Remove `enum_from_u32`.

It's a macro that just creates an enum with a `from_u32` method. It has
two arms. One is unused and the other has a single use.

This commit inlines that single use and removes the whole macro. This
increases readability because we don't have two different macros
interacting (`enum_from_u32` and `language_item_table`).

2 files changed, 0 insertions, 38 deletions

diff --git a/compiler/rustc_data_structures/src/lib.rs b/compiler/rustc_data_structures/src/lib.rs
index 407ee0453e5..85b5a3cdb7c 100644
--- a/compiler/rustc_data_structures/src/lib.rs
+++ b/compiler/rustc_data_structures/src/lib.rs
@@ -62,7 +62,6 @@ pub mod fx;
 pub mod graph;
 pub mod intern;
 pub mod jobserver;
-pub mod macros;
 pub mod marker;
 pub mod memmap;
 pub mod obligation_forest;
diff --git a/compiler/rustc_data_structures/src/macros.rs b/compiler/rustc_data_structures/src/macros.rs
deleted file mode 100644
index e05491f6ff6..00000000000
--- a/compiler/rustc_data_structures/src/macros.rs
+++ /dev/null
@@ -1,37 +0,0 @@
-#[macro_export]
-macro_rules! enum_from_u32 {
-    ($(#[$attr:meta])* pub enum $name:ident {
-        $($(#[$var_attr:meta])* $variant:ident = $e:expr,)*
-    }) => {
-        $(#[$attr])*
-        pub enum $name {
-            $($(#[$var_attr])* $variant = $e),*
-        }
-
-        impl $name {
-            pub fn from_u32(u: u32) -> Option<$name> {
-                $(if u == $name::$variant as u32 {
-                    return Some($name::$variant)
-                })*
-                None
-            }
-        }
-    };
-    ($(#[$attr:meta])* pub enum $name:ident {
-        $($(#[$var_attr:meta])* $variant:ident,)*
-    }) => {
-        $(#[$attr])*
-        pub enum $name {
-            $($(#[$var_attr])* $variant,)*
-        }
-
-        impl $name {
-            pub fn from_u32(u: u32) -> Option<$name> {
-                $(if u == $name::$variant as u32 {
-                    return Some($name::$variant)
-                })*
-                None
-            }
-        }
-    }
-}