diff --git a/mlir/lib/Support/MlirOptMain.cpp b/mlir/lib/Support/MlirOptMain.cpp
--- a/mlir/lib/Support/MlirOptMain.cpp
+++ b/mlir/lib/Support/MlirOptMain.cpp
@@ -202,7 +202,6 @@
   std::string helpHeader = (toolName + "\nAvailable Dialects: ").str();
   {
     llvm::raw_string_ostream os(helpHeader);
-    MLIRContext context;
     interleaveComma(registry.getDialectNames(), os,
                     [&](auto name) { os << name; });
   }