Remove legacy/O/O-MR1 matrices.

Devices with legacy/O/O-MR1 VINTF won't be able to
update to Android S. Devices launching with pre-O,
O, or O-MR1 will need to update its VINTF to P and
above to work with Android S.

Test: builds
Bug: 163419744
Bug: 171260360
Bug: 171260613
Bug: 171260670
Bug: 171260715
Change-Id: I2a65f5a24c0731df9c4247bf9dd2616c2279042f
diff --git a/compatibility_matrices/CleanSpec.mk b/compatibility_matrices/CleanSpec.mk
index 9b150ed..5b351a5 100644
--- a/compatibility_matrices/CleanSpec.mk
+++ b/compatibility_matrices/CleanSpec.mk
@@ -45,3 +45,6 @@
 #$(call add-clean-step, rm -rf $(PRODUCT_OUT)/data/*)
 
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/etc/vintf/compatibility_matrix.device.xml)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/etc/vintf/compatibility_matrix.legacy.xml)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/etc/vintf/compatibility_matrix.1.xml)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/etc/vintf/compatibility_matrix.2.xml)