Make Range.detach() a no-op

Source/core/editing/TextIterator.cpp

Index: Source/core/editing/TextIterator.cpp
diff --git a/Source/core/editing/TextIterator.cpp b/Source/core/editing/TextIterator.cpp
index 5da963a64110d5d051515c6b54e2c5933fa853cb..61072a597d8488a13c155bb1c842a4bc1c1961e6 100644
--- a/Source/core/editing/TextIterator.cpp
+++ b/Source/core/editing/TextIterator.cpp
@@ -2076,8 +2076,8 @@ String plainText(const Range* r, TextIteratorBehaviorFlags behavior)
 
 static PassRefPtrWillBeRawPtr<Range> collapsedToBoundary(const Range* range, bool forward)
 {
-    RefPtrWillBeRawPtr<Range> result = range->cloneRange(ASSERT_NO_EXCEPTION);
-    result->collapse(!forward, ASSERT_NO_EXCEPTION);
+    RefPtrWillBeRawPtr<Range> result = range->cloneRange();
+    result->collapse(!forward);
     return result.release();
 }