Remove dart backend

test/dart_codegen/expect/_internal/lists.dart

-part of dart._internal;
- class Lists {static void copy(List src, int srcStart, List dst, int dstStart, int count) {
-  if (srcStart < dstStart) {
-    for (int i = srcStart + count - 1, j = dstStart + count - 1; i >= srcStart; i--, j--) {
-      dst[j] = src[i];
-      }
-    }
-   else {
-    for (int i = srcStart, j = dstStart; i < srcStart + count; i++, j++) {
-      dst[j] = src[i];
-      }
-    }
-  }
- static bool areEqual(List a, var b) {
-  if (identical(a, b)) return true;
-   if (!(b is List)) return false;
-   int length = a.length;
-   if (length != b.length) return false;
-   for (int i = 0; i < length; i++) {
-    if (!identical(a[i], b[i])) return false;
-    }
-   return true;
-  }
- static int indexOf(List a, Object element, int startIndex, int endIndex) {
-  if (startIndex >= a.length) {
-    return -1;
-    }
-   if (startIndex < 0) {
-    startIndex = 0;
-    }
-   for (int i = startIndex; i < endIndex; i++) {
-    if (a[i] == element) {
-      return i;
-      }
-    }
-   return -1;
-  }
- static int lastIndexOf(List a, Object element, int startIndex) {
-  if (startIndex < 0) {
-    return -1;
-    }
-   if (startIndex >= a.length) {
-    startIndex = a.length - 1;
-    }
-   for (int i = startIndex; i >= 0; i--) {
-    if (a[i] == element) {
-      return i;
-      }
-    }
-   return -1;
-  }
- static void indicesCheck(List a, int start, int end) {
-  RangeError.checkValidRange(start, end, a.length);
-  }
- static void rangeCheck(List a, int start, int length) {
-  RangeError.checkNotNegative(length);
-   RangeError.checkNotNegative(start);
-   if (start + length > a.length) {
-    String message = "$start + $length must be in the range [0..${a.length}]";
-     throw new RangeError.range(length, 0, a.length - start, "length", message);
-    }
-  }
-}