Remove old multicol tests that were only run with the old implementation.

LayoutTests/platform/linux/virtual/slimmingpaint/fast/multicol/max-height-columns-block-expected.txt

Index: LayoutTests/platform/linux/virtual/slimmingpaint/fast/multicol/max-height-columns-block-expected.txt
diff --git a/LayoutTests/platform/linux/virtual/slimmingpaint/fast/multicol/max-height-columns-block-expected.txt b/LayoutTests/platform/linux/virtual/slimmingpaint/fast/multicol/max-height-columns-block-expected.txt
deleted file mode 100644
index 35a557b1b7cf734bd378a30ae0c828e4e494094e..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/linux/virtual/slimmingpaint/fast/multicol/max-height-columns-block-expected.txt
+++ /dev/null
@@ -1,50 +0,0 @@
-layer at (0,0) size 800x600 clip at (0,0) size 800x585 scrollWidth 834
-  LayoutView at (0,0) size 800x600
-layer at (0,0) size 800x585
-  LayoutBlockFlow {HTML} at (0,0) size 800x585
-    LayoutBlockFlow {BODY} at (8,8) size 784x569
-      LayoutBlockFlow (anonymous) at (0,0) size 784x80
-        LayoutText {#text} at (0,0) size 781x79
-          text run at (0,0) width 407: "This is capturing current behavior, but it's not clear that it is correct. "
-          text run at (407,0) width 354: "It's not clear if max-height on a columns block constitutes a"
-          text run at (0,20) width 200: "constraint on the columns or not. "
-          text run at (200,20) width 581: "You obviously begin trying to balance, but only run into the constraint once the balanced columns"
-          text run at (0,40) width 143: "exceed the max-height. "
-          text run at (143,40) width 306: "It's not clear that you should suddenly shift to a fill. "
-          text run at (449,40) width 329: "Our current behavior (which matches Firefox) is to just"
-          text run at (0,60) width 276: "overflow without changing from balance to fill."
-layer at (8,88) size 404x64
-  LayoutBlockFlow {DIV} at (0,80) size 404x64 [border: (2px solid #000000)]
-    LayoutMultiColumnSet (anonymous) at (2,2) size 400x60
-layer at (10,90) size 61x596 backgroundClip at (0,0) size 800x585 clip at (0,0) size 800x585 outlineClip at (0,0) size 800x585
-  LayoutMultiColumnFlowThread (anonymous) at (2,2) size 60.80x596
-    LayoutText {#text} at (0,0) size 50x115
-      text run at (0,0) width 41: "This"
-      text run at (0,28) width 15: "is"
-      text run at (0,60) width 50: "some"
-      text run at (0,88) width 37: "text"
-    LayoutBR {BR} at (37,109) size 0x0
-    LayoutText {#text} at (0,120) size 50x115
-      text run at (0,120) width 41: "This"
-      text run at (0,148) width 15: "is"
-      text run at (0,180) width 50: "some"
-      text run at (0,208) width 37: "text"
-    LayoutBR {BR} at (37,229) size 0x0
-    LayoutText {#text} at (0,240) size 50x115
-      text run at (0,240) width 41: "This"
-      text run at (0,268) width 15: "is"
-      text run at (0,300) width 50: "some"
-      text run at (0,328) width 37: "text"
-    LayoutBR {BR} at (37,349) size 0x0
-    LayoutText {#text} at (0,360) size 50x115
-      text run at (0,360) width 41: "This"
-      text run at (0,388) width 15: "is"
-      text run at (0,420) width 50: "some"
-      text run at (0,448) width 37: "text"
-    LayoutBR {BR} at (37,469) size 0x0
-    LayoutText {#text} at (0,480) size 50x115
-      text run at (0,480) width 41: "This"
-      text run at (0,508) width 15: "is"
-      text run at (0,540) width 50: "some"
-      text run at (0,568) width 37: "text"
-    LayoutBR {BR} at (37,589) size 0x0