Deprecate useless CompilationInfo::IsOptimizable predicate.

src/full-codegen/ppc/full-codegen-ppc.cc

Index: src/full-codegen/ppc/full-codegen-ppc.cc
diff --git a/src/full-codegen/ppc/full-codegen-ppc.cc b/src/full-codegen/ppc/full-codegen-ppc.cc
index 4f927f04a8f28cb0709d4e2162588451c68b7870..2d6e7867b560e03d2985b5523a630a90d08a4e33 100644
--- a/src/full-codegen/ppc/full-codegen-ppc.cc
+++ b/src/full-codegen/ppc/full-codegen-ppc.cc
@@ -757,7 +757,7 @@ void FullCodeGenerator::PrepareForBailoutBeforeSplit(Expression* expr,
   // Only prepare for bailouts before splits if we're in a test
   // context. Otherwise, we let the Visit function deal with the
   // preparation to avoid preparing with the same AST id twice.
-  if (!context()->IsTest() || !info_->IsOptimizable()) return;
+  if (!context()->IsTest()) return;
 
   Label skip;
   if (should_normalize) __ b(&skip);