Auto merge of #85910 - cjgillot:no-meta-version, r=Aaron1011

Drop metadata_encoding_version.

Part of #85153

r? `@Aaron1011`

3 files changed, 4 insertions, 6 deletions

diff --git a/compiler/rustc_metadata/src/lib.rs b/compiler/rustc_metadata/src/lib.rs
index 27842ac7796..2c9bad7e5ce 100644
--- a/compiler/rustc_metadata/src/lib.rs
+++ b/compiler/rustc_metadata/src/lib.rs
@@ -29,3 +29,5 @@ mod rmeta;
 pub mod creader;
 pub mod dynamic_lib;
 pub mod locator;
+
+pub use rmeta::METADATA_HEADER;
diff --git a/compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs b/compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs
index 7cec4ce1d91..9a97835d9c0 100644
--- a/compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs
+++ b/compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs
@@ -1,7 +1,7 @@
 use crate::creader::{CStore, LoadedMacro};
 use crate::foreign_modules;
 use crate::native_libs;
-use crate::rmeta::{self, encoder};
+use crate::rmeta::encoder;
 
 use rustc_ast as ast;
 use rustc_ast::expand::allocator::AllocatorKind;
@@ -536,10 +536,6 @@ impl CrateStore for CStore {
         encoder::encode_metadata(tcx)
     }
 
-    fn metadata_encoding_version(&self) -> &[u8] {
-        rmeta::METADATA_HEADER
-    }
-
     fn allocator_kind(&self) -> Option<AllocatorKind> {
         self.allocator_kind()
     }
diff --git a/compiler/rustc_metadata/src/rmeta/mod.rs b/compiler/rustc_metadata/src/rmeta/mod.rs
index 04fe5cf5890..99ea0cc8f2f 100644
--- a/compiler/rustc_metadata/src/rmeta/mod.rs
+++ b/compiler/rustc_metadata/src/rmeta/mod.rs
@@ -52,7 +52,7 @@ const METADATA_VERSION: u8 = 5;
 /// This header is followed by the position of the `CrateRoot`,
 /// which is encoded as a 32-bit big-endian unsigned integer,
 /// and further followed by the rustc version string.
-crate const METADATA_HEADER: &[u8; 8] = &[b'r', b'u', b's', b't', 0, 0, 0, METADATA_VERSION];
+pub const METADATA_HEADER: &[u8] = &[b'r', b'u', b's', b't', 0, 0, 0, METADATA_VERSION];
 
 /// Additional metadata for a `Lazy<T>` where `T` may not be `Sized`,
 /// e.g. for `Lazy<[T]>`, this is the length (count of `T` values).