[full-codegen] Remove superfluous NestedStatement use in VisitDoExpression

BUG=

Review-Url: https://codereview.chromium.org/1943893003
Cr-Commit-Position: refs/heads/master@{#36026}

src/full-codegen/full-codegen.cc

@@ -855,7 +855,6 @@ void FullCodeGenerator::VisitBlock(Block* stmt) {
 
 void FullCodeGenerator::VisitDoExpression(DoExpression* expr) {
   Comment cmnt(masm_, "[ Do Expression");
-  NestedStatement nested_block(this);
   SetExpressionPosition(expr);
   VisitBlock(expr->block());
   EmitVariableLoad(expr->result());