Remove legacy V8 workaround from normalizeReference(), #1153

src/common/utils.ts

@@ -253,17 +253,6 @@ function normalizeReference (str: string) {
   //
   str = str.trim().replace(/\s+/g, ' ')
 
-  // In node v10 'ẞ'.toLowerCase() === 'Ṿ', which is presumed to be a bug
-  // fixed in v12 (couldn't find any details).
-  //
-  // So treat this one as a special case
-  // (remove this when node v10 is no longer supported).
-  //
-  if ('ẞ'.toLowerCase() === 'Ṿ') {
-    /* c8 ignore next 2 */
-    str = str.replace(/ẞ/g, 'ß')
-  }
-
   // .toLowerCase().toUpperCase() should get rid of all differences
   // between letter variants.
   //