Remove unused DartVM::IsKernelMapping (#8381)

runtime/dart_vm.cc

@@ -183,26 +183,6 @@ bool DartVM::IsRunningPrecompiledCode() {
   return Dart_IsPrecompiledRuntime();
 }
 
-bool DartVM::IsKernelMapping(const fml::FileMapping* mapping) {
-  if (mapping == nullptr) {
-    return false;
-  }
-
-  const uint8_t kKernelHeaderMagic[] = {0x90, 0xAB, 0xCD, 0xEF};
-  const size_t kKernelHeaderMagicSize = sizeof(kKernelHeaderMagic);
-
-  if (mapping->GetSize() < kKernelHeaderMagicSize) {
-    return false;
-  }
-
-  if (memcmp(kKernelHeaderMagic, mapping->GetMapping(),
-             kKernelHeaderMagicSize) != 0) {
-    return false;
-  }
-
-  return true;
-}
-
 static std::vector<const char*> ProfilingFlags(bool enable_profiling) {
 // Disable Dart's built in profiler when building a debug build. This
 // works around a race condition that would sometimes stop a crash's

runtime/dart_vm.h

@@ -38,8 +38,6 @@ class DartVM : public fml::RefCountedThreadSafe<DartVM> {
 
   static bool IsRunningPrecompiledCode();
 
-  static bool IsKernelMapping(const fml::FileMapping* mapping);
-
   const Settings& GetSettings() const;
 
   const DartSnapshot& GetVMSnapshot() const;