Revert "Tests on FP Math.abs()"

This reverts commit b6787770.


On  art-relocate-no-patchoat (linux) 
we saw


#################### info
# Tests on floating-point Math.abs.
#################### diffs
--- expected.txt	2016-12-22 21:33:16.796152568 +0000
+++ output.txt	2016-12-22 21:44:16.685738052 +0000
@@ -1 +1,3 @@
-passed
+Exception in thread "main" java.lang.Error: Expected: 0x7f800001, found: 0x7fc00001
+	at Main.expectEquals32(Main.java:140)
+	at Main.main(Main.java:85)
####################

Change-Id: If8d1bce9d4d20668661af82bbd08940787cd8252