[turbofan] Remove escape analysis stats counters.

src/compiler/escape-analysis-reducer.h

Index: src/compiler/escape-analysis-reducer.h
diff --git a/src/compiler/escape-analysis-reducer.h b/src/compiler/escape-analysis-reducer.h
index 746d84030eba711c4468bc6b85111eb46d4e7926..01c2ae118bbad23feb69d583c0697e1db4a32726 100644
--- a/src/compiler/escape-analysis-reducer.h
+++ b/src/compiler/escape-analysis-reducer.h
@@ -49,7 +49,6 @@ class V8_EXPORT_PRIVATE EscapeAnalysisReducer final
   JSGraph* jsgraph() const { return jsgraph_; }
   EscapeAnalysis* escape_analysis() const { return escape_analysis_; }
   Zone* zone() const { return zone_; }
-  Isolate* isolate() const;
 
   JSGraph* const jsgraph_;
   EscapeAnalysis* escape_analysis_;