Remove v8::Isolate::ClearInterrupt

The method was deprecated a while ago: https://crrev.com/87e4bba31eabfd3b12e42b5886dc9da08d2daf13

LOG=Y
BUG=YES
API=Remove v8::Isolate::ClearInterrupt

Review URL: https://codereview.chromium.org/1032623007

Cr-Commit-Position: refs/heads/master@{#27449}

include/v8.h

@@ -5347,13 +5347,6 @@ class V8_EXPORT Isolate {
    */
   void RequestInterrupt(InterruptCallback callback, void* data);
 
-  /**
-   * Clear interrupt request created by |RequestInterrupt|.
-   * Can be called from another thread without acquiring a |Locker|.
-   */
-  V8_DEPRECATED("There's no way to clear interrupts in flight.",
-                void ClearInterrupt());
-
   /**
    * Request garbage collection in this Isolate. It is only valid to call this
    * function if --expose_gc was specified.

src/api.cc

@@ -6787,10 +6787,6 @@ void Isolate::RequestInterrupt(InterruptCallback callback, void* data) {
 }
 
 
-void Isolate::ClearInterrupt() {
-}
-
-
 void Isolate::RequestGarbageCollectionForTesting(GarbageCollectionType type) {
   CHECK(i::FLAG_expose_gc);
   if (type == kMinorGarbageCollection) {