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

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

Index: LayoutTests/platform/mac/virtual/slimmingpaint/fast/multicol/max-height-columns-block-expected.txt
diff --git a/LayoutTests/platform/mac/virtual/slimmingpaint/fast/multicol/max-height-columns-block-expected.txt b/LayoutTests/platform/mac/virtual/slimmingpaint/fast/multicol/max-height-columns-block-expected.txt
deleted file mode 100644
index 666b363ed217be60f1220555175fd2fa37d9d691..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/mac/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 784x72
-        LayoutText {#text} at (0,0) size 784x72
-          text run at (0,0) width 439: "This is capturing current behavior, but it's not clear that it is correct. "
-          text run at (438,0) width 299: "It's not clear if max-height on a columns block"
-          text run at (0,18) width 299: "constitutes a constraint on the columns or not. "
-          text run at (298,18) width 486: "You obviously begin trying to balance, but only run into the constraint once"
-          text run at (0,36) width 296: "the balanced columns exceed the max-height. "
-          text run at (295,36) width 334: "It's not clear that you should suddenly shift to a fill. "
-          text run at (628,36) width 136: "Our current behavior"
-          text run at (0,54) width 524: "(which matches Firefox) is to just overflow without changing from balance to fill."
-layer at (8,80) size 404x64
-  LayoutBlockFlow {DIV} at (0,72) size 404x64 [border: (2px solid #000000)]
-    LayoutMultiColumnSet (anonymous) at (2,2) size 400x60
-layer at (10,82) 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 51x116
-      text run at (0,0) width 43: "This"
-      text run at (0,28) width 17: "is"
-      text run at (0,60) width 51: "some"
-      text run at (0,88) width 36: "text"
-    LayoutBR {BR} at (35,110) size 1x0
-    LayoutText {#text} at (0,120) size 51x116
-      text run at (0,120) width 43: "This"
-      text run at (0,148) width 17: "is"
-      text run at (0,180) width 51: "some"
-      text run at (0,208) width 36: "text"
-    LayoutBR {BR} at (35,230) size 1x0
-    LayoutText {#text} at (0,240) size 51x116
-      text run at (0,240) width 43: "This"
-      text run at (0,268) width 17: "is"
-      text run at (0,300) width 51: "some"
-      text run at (0,328) width 36: "text"
-    LayoutBR {BR} at (35,350) size 1x0
-    LayoutText {#text} at (0,360) size 51x116
-      text run at (0,360) width 43: "This"
-      text run at (0,388) width 17: "is"
-      text run at (0,420) width 51: "some"
-      text run at (0,448) width 36: "text"
-    LayoutBR {BR} at (35,470) size 1x0
-    LayoutText {#text} at (0,480) size 51x116
-      text run at (0,480) width 43: "This"
-      text run at (0,508) width 17: "is"
-      text run at (0,540) width 51: "some"
-      text run at (0,568) width 36: "text"
-    LayoutBR {BR} at (35,590) size 1x0