Revert of Use Shadow DOM to display fallback content for images

LayoutTests/fast/images/alt-text-wrapping-expected.html

Index: LayoutTests/fast/images/alt-text-wrapping-expected.html
diff --git a/LayoutTests/fast/images/alt-text-wrapping-expected.html b/LayoutTests/fast/images/alt-text-wrapping-expected.html
deleted file mode 100644
index 0e99e3e06d5dfbf9e3d9751bac7e2780918fc4dc..0000000000000000000000000000000000000000
--- a/LayoutTests/fast/images/alt-text-wrapping-expected.html
+++ /dev/null
@@ -1,17 +0,0 @@
-<style>
-    #alttext-container {
-        overflow: hidden;
-        border: 1px solid silver;
-        padding: 1px;
-        display: inline-block;        
-        width: 100px;
-        height: 100px;
-        box-sizing: border-box;
-    }                                 
-    #alttext { overflow: hidden; }
-</style>                                    
-<div id="alttext-container">                  
-    <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAIAAACQkWg2AAABO0lEQVR4XpWRTytEYRTG3/tHLGQrNfEBpKQkmc8gG0ulxpRsfQ0TTXbI3kZ2ys4tsyBZjN1N8idlYUYaxJzzOKf7ztG1MfN0ens69/x6n/eeYPuo7npS9bCOriXDMQOCTVbO3X+6Wp9mICZWAHqquE1qAA8EQRiFcmYMsQKsAHM2DeKV4qj48ZHB++bHwcXTQ+Mz6u/rABwSIQO0wKW5wuLU8E5yWzlJS7OFvaUJMGelAFkkYici1NIXB4DQbH1JY2ggVoD4N1Kb2AAA149vUmLLxbHaTaNynIJggAz7G7jTyjB5wOv79/LupT47Cu0rcT6S/ai755YUiMM4cgw4/I3ERAaI3y/PiFnYPHOBtfORLKX38AaBERaJbHFeAOY3Eu8ZOYByi7Pl+hzWN+nwWjVB15LhYHXr1PWiH0AYTw4BBjO9AAAAAElFTkSuQmCC" width="16" height="16" align="left" style="margin: 0px">
-    <div id="alttext">This text should wrap inside the fallback content.</div>         
-</div>                                                  
-