chore: remove unused gin::Converter<char[]>::ToV8(isolate, const char*) (#44568)

No longer needed after #44498

shell/common/gin_converters/std_converter.h

@@ -54,14 +54,6 @@ struct Converter<std::nullptr_t> {
   }
 };
 
-template <>
-struct Converter<char[]> {
-  static v8::Local<v8::Value> ToV8(v8::Isolate* isolate, const char* val) {
-    return v8::String::NewFromUtf8(isolate, val, v8::NewStringType::kNormal)
-        .ToLocalChecked();
-  }
-};
-
 template <size_t N>
 struct Converter<char[N]> {
   static v8::Local<v8::Value> ToV8(v8::Isolate* isolate, const char (&val)[N]) {