Remove LayoutTests that test the now unsupported user-select: ignore

third_party/WebKit/LayoutTests/platform/linux/editing/selection/5240265-expected.txt

-layer at (0,0) size 800x600
-  LayoutView at (0,0) size 800x600
-layer at (0,0) size 800x600
-  LayoutBlockFlow {HTML} at (0,0) size 800x600
-    LayoutBlockFlow {BODY} at (8,8) size 784x584
-      LayoutBlockFlow {P} at (0,0) size 784x60
-        LayoutText {#text} at (0,0) size 780x59
-          text run at (0,0) width 757: "This tests to see that clicking on content outside of an editable region with -webkit-user-select: ignore doesn't remove the"
-          text run at (0,20) width 465: "selection from the editable region. To run it manually, click on the button. "
-          text run at (464,20) width 316: "The editable region should not be focused, but the"
-          text run at (0,40) width 216: "text inside of it should be selected."
-      LayoutBlockFlow (anonymous) at (0,76) size 784x22
-        LayoutButton {INPUT} at (0,0) size 85x22 [bgcolor=#C0C0C0] [border: (2px outset #C0C0C0)]
-          LayoutBlockFlow (anonymous) at (8,3) size 69x16
-            LayoutText {#text} at (0,0) size 69x16
-              text run at (0,0) width 69: "Click on me"
-        LayoutText {#text} at (0,0) size 0x0
-      LayoutBlockFlow {DIV} at (0,98) size 784x20
-        LayoutText {#text} at (0,0) size 178x19
-          text run at (0,0) width 178: "This text should be selected."
-selection start: position 0 of child 0 {#text} of child 4 {DIV} of body
-selection end:   position 29 of child 0 {#text} of child 4 {DIV} of body