[turbofan] Remove IfExceptionHint from exception projections.

src/compiler/ast-graph-builder.h

Index: src/compiler/ast-graph-builder.h
diff --git a/src/compiler/ast-graph-builder.h b/src/compiler/ast-graph-builder.h
index 28e5578c3308ee62dd913ebfdce8cec7ca038c42..ec13731c108446851edb318d07b6667e22b2bd13 100644
--- a/src/compiler/ast-graph-builder.h
+++ b/src/compiler/ast-graph-builder.h
@@ -101,9 +101,6 @@ class AstGraphBuilder : public AstVisitor<AstGraphBuilder> {
   // Tracks how many try-blocks are currently entered.
   int try_nesting_level_;
 
-  // Tracks the prediction of the innermost try-block.
-  HandlerTable::CatchPrediction try_catch_prediction_;
-
   // Temporary storage for building node input lists.
   int input_buffer_size_;
   Node** input_buffer_;