refer to original path, not a re-export

Author: tshepang

src/diagnostics/lintstore.md

@@ -15,7 +15,7 @@ of these as just "lints."
 First, we have the lint declarations themselves: this is where the name and
 default lint level and other metadata come from. These are normally defined by
 way of the [`declare_lint!`] macro, which boils down to a static with type
-`&rustc_session::lint::Lint`.
+`&rustc_lint::Lint`.
 
 As of <!-- date-check --> February 2022, we lint against direct declarations
 without the use of the macro today (although this may change in the future, as