Revert unnecessary visibility change

Author: osiewicz

compiler/rustc_metadata/src/locator.rs

@@ -247,7 +247,7 @@ pub(crate) struct CrateLocator<'a> {
     cfg_version: &'static str,
 
     // Immutable per-search configuration.
-    pub crate_name: Symbol,
+    crate_name: Symbol,
     exact_paths: Vec<CanonicalizedPath>,
     pub hash: Option<Svh>,
     extra_filename: Option<&'a str>,