diff --git a/mlir/include/mlir/Pass/PassRegistry.h b/mlir/include/mlir/Pass/PassRegistry.h
--- a/mlir/include/mlir/Pass/PassRegistry.h
+++ b/mlir/include/mlir/Pass/PassRegistry.h
@@ -123,12 +123,6 @@
     std::function<void(function_ref<void(const detail::PassOptions &)>)>
         optHandler);
 
-/// Register a specific dialect pass allocator function with the system,
-/// typically used through the PassRegistration template.
-/// Deprecated: please use the alternate version below.
-void registerPass(StringRef arg, StringRef description,
-                  const PassAllocatorFunction &function);
-
 /// Register a specific dialect pass allocator function with the system,
 /// typically used through the PassRegistration template.
 void registerPass(const PassAllocatorFunction &function);
@@ -149,17 +143,6 @@
   }
   PassRegistration()
       : PassRegistration([] { return std::make_unique<ConcretePass>(); }) {}
-
-  /// Constructor below are deprecated.
-
-  PassRegistration(StringRef arg, StringRef description,
-                   const PassAllocatorFunction &constructor) {
-    registerPass(arg, description, constructor);
-  }
-
-  PassRegistration(StringRef arg, StringRef description)
-      : PassRegistration(arg, description,
-                         [] { return std::make_unique<ConcretePass>(); }) {}
 };
 
 /// PassPipelineRegistration provides a global initializer that registers a Pass
diff --git a/mlir/lib/Pass/PassRegistry.cpp b/mlir/lib/Pass/PassRegistry.cpp
--- a/mlir/lib/Pass/PassRegistry.cpp
+++ b/mlir/lib/Pass/PassRegistry.cpp
@@ -107,14 +107,19 @@
             optHandler(allocator()->passOptions);
           }) {}
 
-void mlir::registerPass(StringRef arg, StringRef description,
-                        const PassAllocatorFunction &function) {
+void mlir::registerPass(const PassAllocatorFunction &function) {
+  std::unique_ptr<Pass> pass = function();
+  StringRef arg = pass->getArgument();
+  if (arg.empty())
+    llvm::report_fatal_error(
+        "Trying to register a pass that does not override `getArgument()`");
+  StringRef description = pass->getDescription();
   PassInfo passInfo(arg, description, function);
   passRegistry->try_emplace(arg, passInfo);
 
   // Verify that the registered pass has the same ID as any registered to this
   // arg before it.
-  TypeID entryTypeID = function()->getTypeID();
+  TypeID entryTypeID = pass->getTypeID();
   auto it = passRegistryTypeIDs->try_emplace(arg, entryTypeID).first;
   if (it->second != entryTypeID)
     llvm::report_fatal_error(
@@ -123,16 +128,6 @@
         arg);
 }
 
-void mlir::registerPass(const PassAllocatorFunction &function) {
-  std::unique_ptr<Pass> pass = function();
-  StringRef arg = pass->getArgument();
-  if (arg.empty())
-    llvm::report_fatal_error(
-        "Trying to register a pass that does not override `getArgument()`: " +
-        pass->getName());
-  registerPass(arg, pass->getDescription(), function);
-}
-
 /// Returns the pass info for the specified pass argument or null if unknown.
 const PassInfo *mlir::Pass::lookupPassInfo(StringRef passArg) {
   auto it = passRegistry->find(passArg);