Revert of [regexp] Create property on result for each named capture

src/regexp/regexp-parser.cc

Index: src/regexp/regexp-parser.cc
diff --git a/src/regexp/regexp-parser.cc b/src/regexp/regexp-parser.cc
index ebaccc5588c335ca17e1b9df0003146a42f2ecdf..3621f7d96e4fbf4634b7a214d7beb5defa019eae 100644
--- a/src/regexp/regexp-parser.cc
+++ b/src/regexp/regexp-parser.cc
@@ -770,15 +770,6 @@
   DCHECK(0 < index && index <= captures_started_);
   DCHECK_NOT_NULL(name);
 
-  // Disallow captures named '__proto__'.
-  static const char16_t proto_string[] = u"__proto__";
-  if (name->size() == arraysize(proto_string) - 1) {
-    if (std::equal(name->begin(), name->end(), &proto_string[0])) {
-      ReportError(CStrVector("Illegal capture group name"));
-      return false;
-    }
-  }
-
   if (named_captures_ == nullptr) {
     named_captures_ = new (zone()) ZoneList<RegExpCapture*>(1, zone());
   } else {