Fix pre-existing HintCode.UNNECESSARY_TYPE_CHECK_TRUE (#456)
diff --git a/packages/flutter_markdown/lib/src/builder.dart b/packages/flutter_markdown/lib/src/builder.dart
index 595198d..dfa53e6 100644
--- a/packages/flutter_markdown/lib/src/builder.dart
+++ b/packages/flutter_markdown/lib/src/builder.dart
@@ -732,8 +732,7 @@
for (int index = 1; index < textSpans.length; index++) {
final TextSpan nextChild = textSpans[index];
- if (nextChild is TextSpan &&
- nextChild.recognizer == mergedSpans.last.recognizer &&
+ if (nextChild.recognizer == mergedSpans.last.recognizer &&
nextChild.semanticsLabel == mergedSpans.last.semanticsLabel &&
nextChild.style == mergedSpans.last.style) {
final TextSpan previous = mergedSpans.removeLast();