Revert of [SVG] Implement 'discard' element

LayoutTests/svg/animations/discard-on-discard-expected.txt

Index: LayoutTests/svg/animations/discard-on-discard-expected.txt
diff --git a/LayoutTests/svg/animations/discard-on-discard-expected.txt b/LayoutTests/svg/animations/discard-on-discard-expected.txt
deleted file mode 100644
index da439b82db0c8dbfa82fdb0fb3fcd64624efd109..0000000000000000000000000000000000000000
--- a/LayoutTests/svg/animations/discard-on-discard-expected.txt
+++ /dev/null
@@ -1,30 +0,0 @@
-SVG 1.1 dynamic animation tests
-
-
-Test the behavior of one discard applied on another discard
-
-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
-
-
-PASS colorComponents[1] is 255
-PASS colorComponents[2] is 0
-PASS colorComponents[3] is 0
-PASS colorComponents[1] is 255
-PASS colorComponents[2] is 0
-PASS colorComponents[3] is 0
-PASS colorComponents[1] is 0
-PASS colorComponents[2] is 255
-PASS colorComponents[3] is 0
-PASS colorComponents[1] is 0
-PASS colorComponents[2] is 255
-PASS colorComponents[3] is 0
-PASS colorComponents[1] is 0
-PASS colorComponents[2] is 255
-PASS colorComponents[3] is 0
-PASS colorComponents[1] is 0
-PASS colorComponents[2] is 255
-PASS colorComponents[3] is 0
-PASS successfullyParsed is true
-
-TEST COMPLETE
-