No need to start Ticker for Crankshaft

src/log.h

Index: src/log.h
diff --git a/src/log.h b/src/log.h
index a5eddc7a34541e289dd8ec5dd8f8df4837add157..03fd5bd1c32c43f81e6817e2cdc6f8771e008f48 100644
--- a/src/log.h
+++ b/src/log.h
@@ -168,9 +168,6 @@ class Logger {
   void SetCodeEventHandler(uint32_t options,
                            JitCodeEventHandler event_handler);
 
-  void EnsureTickerStarted();
-  void EnsureTickerStopped();
-
   Sampler* sampler();
 
   // Frees resources acquired in SetUp.
@@ -448,9 +445,6 @@ class Logger {
   void UncheckedIntEvent(const char* name, int value);
   void UncheckedIntPtrTEvent(const char* name, intptr_t value);
 
-  // Returns whether profiler's sampler is active.
-  bool IsProfilerSamplerActive();
-
   Isolate* isolate_;
 
   // The sampler used by the profiler and the sliding state window.