removed date-check

Author: Ko496-glitch

src/doc/rustc-dev-guide/src/diagnostics/lintstore.md

@@ -21,7 +21,6 @@ which boils down to a static with type [`&rustc_lint_defs::Lint`]
 as the macro is somewhat unwieldy to add new fields to,
 like all macros).
 
-As of <!-- date-check --> March 2026,
 we lint against direct declarations without the use of the macro.
 
 Lint declarations don't carry any "state" - they are merely global identifiers