Revert "Add BUILD_BROKEN_DONT_CHECK_SYSTEMSDK"

Revert submission 2897682-dont_limit_systemsdk

Reason for revert: blocking revert for 318695834

Bug:318695834

Reverted changes: /q/submissionid:2897682-dont_limit_systemsdk

Change-Id: Ic4a63fe81434ddb9cb57519bd11c1924224111c6
diff --git a/core/local_systemsdk.mk b/core/local_systemsdk.mk
index 3307e72..fcde700 100644
--- a/core/local_systemsdk.mk
+++ b/core/local_systemsdk.mk
@@ -82,10 +82,8 @@
   endif
 
   ifneq ($(_system_sdk_version),$(filter $(_system_sdk_version),$(_supported_systemsdk_versions)))
-    ifneq (true,$(BUILD_BROKEN_DONT_CHECK_SYSTEMSDK)
-      $(call pretty-error,Incompatible LOCAL_SDK_VERSION '$(LOCAL_SDK_VERSION)'. \
-             System SDK version '$(_system_sdk_version)' is not supported. Supported versions are: $(_supported_systemsdk_versions))
-    endif
+    $(call pretty-error,Incompatible LOCAL_SDK_VERSION '$(LOCAL_SDK_VERSION)'. \
+           System SDK version '$(_system_sdk_version)' is not supported. Supported versions are: $(_supported_systemsdk_versions))
   endif
   _system_sdk_version :=
   _supported_systemsdk_versions :=