[LVI][NFC] Delete an outdated comment (#101504)

Transitioned from inheritance to has-a relationship in 9db7948

Author: pfusik

llvm/lib/Analysis/LazyValueInfo.cpp

@@ -360,9 +360,7 @@ class LazyValueInfoAnnotatedWriter : public AssemblyAnnotationWriter {
                             formatted_raw_ostream &OS) override;
 };
 } // namespace
-// The actual implementation of the lazy analysis and update.  Note that the
-// inheritance from LazyValueInfoCache is intended to be temporary while
-// splitting the code and then transitioning to a has-a relationship.
+// The actual implementation of the lazy analysis and update.
 class LazyValueInfoImpl {
 
   /// Cached results from previous queries