Bug 1479970 - Remove IonBuilder::traceLogger(). r=jandem

This only had one use is inconsistent with other tracelogger users.

Differential Revision: https://phabricator.services.mozilla.com/D27103

--HG--
extra : moz-landing-system : lando

js/src/jit/IonBuilder.cpp

@@ -2564,7 +2564,8 @@ AbortReasonOr<Ok> IonBuilder::inspectOpcode(JSOp op) {
 }
 
 AbortReasonOr<Ok> IonBuilder::restartLoop(const CFGBlock* cfgHeader) {
-  AutoTraceLog logCompile(traceLogger(), TraceLogger_IonBuilderRestartLoop);
+  AutoTraceLog logCompile(TraceLoggerForCurrentThread(),
+                          TraceLogger_IonBuilderRestartLoop);
 
   spew("New types at loop header, restarting loop body");
 

js/src/jit/IonBuilder.h

@@ -1012,8 +1012,6 @@ class IonBuilder : public MIRGenerator,
     return actionableAbortScript_ != nullptr;
   }
 
-  TraceLoggerThread* traceLogger() { return TraceLoggerForCurrentThread(); }
-
   void actionableAbortLocationAndMessage(JSScript** abortScript,
                                          jsbytecode** abortPc,
                                          const char** abortMessage) {