Remove dead code for generated code coverage.

src/full-codegen/s390/full-codegen-s390.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_S390
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 428 matching lines @@
       // Push the return value on the stack as the parameter.
       // Runtime::TraceExit returns its parameter in r2
       __ push(r2);
       __ CallRuntime(Runtime::kTraceExit);
     }
     EmitProfilingCounterHandlingForReturnSequence(false);
 
     // Make sure that the constant pool is not emitted inside of the return
     // sequence.
     {
-      // Here we use masm_-> instead of the __ macro to avoid the code coverage
-      // tool from instrumenting as we rely on the code size here.
       int32_t arg_count = info_->scope()->num_parameters() + 1;
       int32_t sp_delta = arg_count * kPointerSize;
       SetReturnPosition(literal());
       __ LeaveFrame(StackFrame::JAVA_SCRIPT, sp_delta);
 
       __ Ret();
     }
   }
 }
 
@@ skipping 3220 matching lines @@
   DCHECK(kOSRBranchInstruction == br_instr);
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OnStackReplacement()->entry());
   return ON_STACK_REPLACEMENT;
 }
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_S390