Replace 'the the' with 'the'

runtime/vm/virtual_memory.h

Index: runtime/vm/virtual_memory.h
diff --git a/runtime/vm/virtual_memory.h b/runtime/vm/virtual_memory.h
index 4a7ecd27b3d174c835b9024583d78ea972004ed8..92b8581ec8060942fb8c7637cd2d0f64545e8c27 100644
--- a/runtime/vm/virtual_memory.h
+++ b/runtime/vm/virtual_memory.h
@@ -94,7 +94,7 @@ class VirtualMemory {
   static uword page_size_;
 
   // False for a part of a snapshot added directly to the Dart heap, which
-  // belongs to the the embedder and must not be deallocated or have its
+  // belongs to the embedder and must not be deallocated or have its
   // protection status changed by the VM.
   bool vm_owns_region_;