Revert 17877 - Introduce a v8::Platform class that bundles embedder callbacks

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 8b290bdea9fcb28ff84de11a00042629b3711f0b..2f8af27263e8f9cf46cddb1992611211b35d3517 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -105,7 +105,6 @@ class NumberObject;
 class Object;
 class ObjectOperationDescriptor;
 class ObjectTemplate;
-class Platform;
 class Primitive;
 class RawOperationDescriptor;
 class Signature;
@@ -4784,18 +4783,6 @@ class V8_EXPORT V8 {
    */
   static bool InitializeICU();
 
-  /**
-   * Sets the v8::Platform to use. This should be invoked before V8 is
-   * initialized.
-   */
-  static void InitializePlatform(Platform* platform);
-
-  /**
-   * Clears all references to the v8::Platform. This should be invoked after
-   * V8 was disposed.
-   */
-  static void ShutdownPlatform();
-
  private:
   V8();