Revert "Require V8 to be explicitly initialized before an Isolate is created"

samples/shell.cc

Index: samples/shell.cc
diff --git a/samples/shell.cc b/samples/shell.cc
index b66e8f7453d1b38c323b157d5859778f3441b98b..ef61426a0ab97884221d68aa8e992d98fc19135f 100644
--- a/samples/shell.cc
+++ b/samples/shell.cc
@@ -83,7 +83,6 @@ int main(int argc, char* argv[]) {
   v8::V8::InitializeICU();
   v8::Platform* platform = v8::platform::CreateDefaultPlatform();
   v8::V8::InitializePlatform(platform);
-  v8::V8::Initialize();
   v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
   ShellArrayBufferAllocator array_buffer_allocator;
   v8::V8::SetArrayBufferAllocator(&array_buffer_allocator);