[fullcodegen] Remove exception handling support.

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 b56d786c35237c1e85b1ebc72acd527502fc3b21..c58f7419e9b81c9aceecacc18557360b3f722f96 100644
--- a/src/compiler/ast-graph-builder.h
+++ b/src/compiler/ast-graph-builder.h
@@ -71,8 +71,6 @@ class AstGraphBuilder : public AstVisitor<AstGraphBuilder> {
   class ControlScope;
   class ControlScopeForBreakable;
   class ControlScopeForIteration;
-  class ControlScopeForCatch;
-  class ControlScopeForFinally;
   class Environment;
   friend class ControlBuilder;
 
@@ -98,9 +96,6 @@ class AstGraphBuilder : public AstVisitor<AstGraphBuilder> {
   SetOncePointer<Node> function_context_;
   SetOncePointer<Node> new_target_;
 
-  // Tracks how many try-blocks are currently entered.
-  int try_nesting_level_;
-
   // Temporary storage for building node input lists.
   int input_buffer_size_;
   Node** input_buffer_;