Revert "gapps: Re-sign Google{Calender,Contacts}SyncAdapter.apk with platform keys"

This reverts commit 222e58b1af2b325b18a8f111a70ef433187fa8c2.

Change-Id: Ic9db2167f41af4d1f67feaa16245277d25e53c07
diff --git a/Android.mk b/Android.mk
index 860211c..ad907a9 100644
--- a/Android.mk
+++ b/Android.mk
@@ -29,7 +29,6 @@
 LOCAL_MODULE_CLASS := APPS
 LOCAL_PRODUCT_MODULE := true
 LOCAL_PRIVILEGED_MODULE := true
-LOCAL_CERTIFICATE := platform
 include vendor/gapps/build/gms_module.mk
 
 include $(CLEAR_VARS)
@@ -37,7 +36,6 @@
 LOCAL_MODULE_CLASS := APPS
 LOCAL_PRODUCT_MODULE := true
 LOCAL_PRIVILEGED_MODULE := true
-LOCAL_CERTIFICATE := platform
 include vendor/gapps/build/gms_module.mk
 
 include $(CLEAR_VARS)
diff --git a/build/gms_module.mk b/build/gms_module.mk
index 0355574..b98db9b 100644
--- a/build/gms_module.mk
+++ b/build/gms_module.mk
@@ -15,9 +15,7 @@
 #
 
 ifeq ($(LOCAL_MODULE_CLASS), APPS)
-ifeq (,$(LOCAL_CERTIFICATE))
 LOCAL_CERTIFICATE := PRESIGNED
-endif
 LOCAL_SRC_FILES := $(LOCAL_MODULE).apk
 endif
 ifeq ($(LOCAL_MODULE_CLASS), JAVA_LIBRARIES)