Index: clang-tidy/ClangTidy.cpp
===================================================================
--- clang-tidy/ClangTidy.cpp
+++ clang-tidy/ClangTidy.cpp
@@ -393,7 +393,6 @@
 
   for (auto &Check : Checks) {
     Check->registerMatchers(&*Finder);
-    Check->registerPPCallbacks(Compiler);
     Check->registerPPCallbacks(*SM, PP, ModuleExpanderPP);
   }
 
Index: clang-tidy/ClangTidyCheck.h
===================================================================
--- clang-tidy/ClangTidyCheck.h
+++ clang-tidy/ClangTidyCheck.h
@@ -53,9 +53,6 @@
   /// constructor using the Options.get() methods below.
   ClangTidyCheck(StringRef CheckName, ClangTidyContext *Context);
 
-  /// DEPRECATED: Use the other overload.
-  virtual void registerPPCallbacks(CompilerInstance &Compiler) {}
-
   /// \brief Override this to register ``PPCallbacks`` in the preprocessor.
   ///
   /// This should be used for clang-tidy checks that analyze preprocessor-
Index: clangd/ClangdUnit.cpp
===================================================================
--- clangd/ClangdUnit.cpp
+++ clangd/ClangdUnit.cpp
@@ -299,7 +299,6 @@
     for (const auto &Check : CTChecks) {
       // FIXME: the PP callbacks skip the entire preamble.
       // Checks that want to see #includes in the main file do not see them.
-      Check->registerPPCallbacks(*Clang);
       Check->registerPPCallbacks(Clang->getSourceManager(), PP, PP);
       Check->registerMatchers(&CTFinder);
     }
Index: unittests/clang-tidy/ClangTidyTest.h
===================================================================
--- unittests/clang-tidy/ClangTidyTest.h
+++ unittests/clang-tidy/ClangTidyTest.h
@@ -42,7 +42,6 @@
     Preprocessor *PP = &Compiler.getPreprocessor();
     for (auto &Check : Checks) {
       Check->registerMatchers(&Finder);
-      Check->registerPPCallbacks(Compiler);
       Check->registerPPCallbacks(Compiler.getSourceManager(), PP, PP);
     }
     return Finder.newASTConsumer();