sencha: remove unneeded include of nexus/matcha_hw.mk

Change-Id: Ie8a07a3d82e39903d1f0a7659195d176ff7118e0

platforms/sencha/platform.mk

diff --git a/platforms/sencha/platform.mk b/platforms/sencha/platform.mk
index c265c5a..b9ce84e 100644
--- a/platforms/sencha/platform.mk
+++ b/platforms/sencha/platform.mk
@@ -41,7 +41,6 @@
 include $(ROOTDIR)/build/platforms/nexus/kelvin.mk
 include $(ROOTDIR)/build/platforms/nexus/opentitan_sw.mk
 include $(ROOTDIR)/build/platforms/nexus/opentitan_hw.mk
-include $(ROOTDIR)/build/platforms/nexus/matcha_hw.mk
 include $(ROOTDIR)/build/platforms/nexus/tock.mk
 
 # Put simulation targets at the end