Remove JavaString from java_core.

pkg/analyzer/lib/src/generated/parser.dart

Index: pkg/analyzer/lib/src/generated/parser.dart
diff --git a/pkg/analyzer/lib/src/generated/parser.dart b/pkg/analyzer/lib/src/generated/parser.dart
index 4eaece94ff3befa3a2e0b13308297acdba896cbb..21327613f0d5f99eed7583ac26797b31dca3b35e 100644
--- a/pkg/analyzer/lib/src/generated/parser.dart
+++ b/pkg/analyzer/lib/src/generated/parser.dart
@@ -5170,7 +5170,7 @@ class Parser {
         List<int> range = _findRange(codeBlockRanges, leftIndex);
         if (range == null) {
           int nameOffset = token.offset + leftIndex + 1;
-          int rightIndex = JavaString.indexOf(comment, ']', leftIndex);
+          int rightIndex = comment.indexOf(']', leftIndex);
           if (rightIndex >= 0) {
             int firstChar = comment.codeUnitAt(leftIndex + 1);
             if (firstChar != 0x27 && firstChar != 0x22) {
@@ -5207,9 +5207,9 @@ class Parser {
             // next character
             rightIndex = leftIndex + 1;
           }
-          leftIndex = JavaString.indexOf(comment, '[', rightIndex);
+          leftIndex = comment.indexOf('[', rightIndex);
         } else {
-          leftIndex = JavaString.indexOf(comment, '[', range[1] + 1);
+          leftIndex = comment.indexOf('[', range[1]);
         }
       }
     }