Remove MicroData implementation

LayoutTests/fast/dom/MicroData/domsettabletokenlist-attributes-out-of-range-index-expected.txt

-This test verifies itemType[index], itemRef[index], itemProp[index] behavior for out-of-range index.
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-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
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-Test itemType[index]
-PASS element.itemType.item(0) is null
-PASS element.itemType[0] is undefined.
-PASS element.itemType.item(1) is null
-PASS element.itemType[1] is undefined.
-PASS element.itemType.item(0) is null
-PASS element.itemType[0] is undefined.
-PASS element.itemType.item(-1) is null
-PASS element.itemType[-1] is undefined.
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-Test itemRef[index]
-PASS element.itemRef.item(0) is null
-PASS element.itemRef[0] is undefined.
-PASS element.itemRef.item(1) is null
-PASS element.itemRef[1] is undefined.
-PASS element.itemRef.item(0) is null
-PASS element.itemRef[0] is undefined.
-PASS element.itemRef.item(-1) is null
-PASS element.itemRef[-1] is undefined.
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-Test itemProp[index]
-PASS element.itemProp.item(0) is null
-PASS element.itemProp[0] is undefined.
-PASS element.itemProp.item(1) is null
-PASS element.itemProp[1] is undefined.
-PASS element.itemProp.item(0) is null
-PASS element.itemProp[0] is undefined.
-PASS element.itemProp.item(-1) is null
-PASS element.itemProp[-1] is undefined.
-PASS successfullyParsed is true
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-TEST COMPLETE
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