Remove case-insensitive matching of usemap attribute.

third_party/WebKit/LayoutTests/platform/linux/images/imagemap-case-expected.txt

Index: third_party/WebKit/LayoutTests/platform/linux/images/imagemap-case-expected.txt
diff --git a/third_party/WebKit/LayoutTests/platform/linux/images/imagemap-case-expected.txt b/third_party/WebKit/LayoutTests/platform/linux/images/imagemap-case-expected.txt
deleted file mode 100644
index fc26c1ac607774d76b445c263b6698a13bc30cd8..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/platform/linux/images/imagemap-case-expected.txt
+++ /dev/null
@@ -1,30 +0,0 @@
-CONSOLE WARNING: line 21: Case-insensitive matching for usemap attribute is deprecated and will be removed in M58, around April 2017. See https://www.chromestatus.com/features/5760965337415680 for more details. Comparing usemap=#navmap and name=navMap
-CONSOLE WARNING: line 24: Case-insensitive matching for usemap attribute is deprecated and will be removed in M58, around April 2017. See https://www.chromestatus.com/features/5760965337415680 for more details. Comparing usemap=#navMap2 and name=navmap2
-layer at (0,0) size 800x600
-  LayoutView at (0,0) size 800x600
-layer at (0,0) size 800x274
-  LayoutBlockFlow {HTML} at (0,0) size 800x274
-    LayoutBlockFlow {BODY} at (8,8) size 784x258
-      LayoutBlockFlow (anonymous) at (0,0) size 784x218
-        LayoutInline {MAP} at (0,0) size 0x0
-          LayoutText {#text} at (0,0) size 0x0
-          LayoutInline {AREA} at (0,0) size 0x0
-          LayoutText {#text} at (0,0) size 0x0
-        LayoutText {#text} at (0,0) size 0x0
-        LayoutImage {IMG} at (0,0) size 104x104 [border: (2px solid #000000)]
-        LayoutText {#text} at (104,89) size 4x19
-          text run at (104,89) width 4: " "
-        LayoutBR {BR} at (0,0) size 0x0
-        LayoutInline {MAP} at (0,0) size 0x0
-          LayoutText {#text} at (0,0) size 0x0
-          LayoutInline {AREA} at (0,0) size 0x0
-          LayoutText {#text} at (0,0) size 0x0
-        LayoutText {#text} at (0,0) size 0x0
-        LayoutImage {IMG} at (0,109) size 104x104 [border: (2px solid #000000)]
-        LayoutText {#text} at (0,0) size 0x0
-      LayoutBlockFlow {DIV} at (0,218) size 784x20
-        LayoutText {#text} at (0,0) size 46x19
-          text run at (0,0) width 46: "success"
-      LayoutBlockFlow {DIV} at (0,238) size 784x20
-        LayoutText {#text} at (0,0) size 46x19
-          text run at (0,0) width 46: "success"