Remove unnecessary OWNERS file in libs/dice

@ascull is already in the OWNERS file of the parent project.

Test: N/A
Change-Id: Ia61abd71425082f2ab61983edf9c129287991cc5
diff --git a/libs/dice/OWNERS b/libs/dice/OWNERS
deleted file mode 100644
index fbc501d..0000000
--- a/libs/dice/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-ascull@google.com