Remove unused build_system_stats.txt

Bug: 398037037
Test: treehugger
Change-Id: I2c00abb270afec0c0c7234a6fb202b62af48627d
diff --git a/core/Makefile b/core/Makefile
index 228fa72..40ceb97 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -839,16 +839,6 @@
 
 
 # -----------------------------------------------------------------
-# build system stats
-BUILD_SYSTEM_STATS := $(PRODUCT_OUT)/build_system_stats.txt
-$(BUILD_SYSTEM_STATS):
-	@rm -f $@
-	@$(foreach s,$(STATS.MODULE_TYPE),echo "modules_type_make,$(s),$(words $(STATS.MODULE_TYPE.$(s)))" >>$@;)
-	@$(foreach s,$(STATS.SOONG_MODULE_TYPE),echo "modules_type_soong,$(s),$(STATS.SOONG_MODULE_TYPE.$(s))" >>$@;)
-$(call declare-1p-target,$(BUILD_SYSTEM_STATS),build)
-$(call dist-for-goals,droidcore-unbundled,$(BUILD_SYSTEM_STATS))
-
-# -----------------------------------------------------------------
 # build /product/etc/security/avb/system_other.avbpubkey if needed
 ifdef BUILDING_SYSTEM_OTHER_IMAGE
 ifeq ($(BOARD_AVB_ENABLE),true)