Remove _API_FILE variables

There are no known usages of these variables, and they've been
incorrectly set for a long time.

The phony for $(LOCAL_MODULE) in droiddoc to build the api txt
has been moved to soong.

Bug: 152479829
Test: m
Change-Id: I31742e50d1af42fb899c7a3436af5647bd90cc47
diff --git a/core/config.mk b/core/config.mk
index b329b0d..f086a9a 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -1149,19 +1149,6 @@
 TARGET_SDK_VERSIONS_WITHOUT_JAVA_18_SUPPORT := $(call numbers_less_than,24,$(TARGET_AVAILABLE_SDK_VERSIONS))
 TARGET_SDK_VERSIONS_WITHOUT_JAVA_19_SUPPORT := $(call numbers_less_than,30,$(TARGET_AVAILABLE_SDK_VERSIONS))
 
-ifndef INTERNAL_PLATFORM_PRIVATE_API_FILE
-INTERNAL_PLATFORM_PRIVATE_API_FILE := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/private.txt
-endif
-ifndef INTERNAL_PLATFORM_PRIVATE_DEX_API_FILE
-INTERNAL_PLATFORM_PRIVATE_DEX_API_FILE := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/private-dex.txt
-endif
-ifndef INTERNAL_PLATFORM_SYSTEM_PRIVATE_API_FILE
-INTERNAL_PLATFORM_SYSTEM_PRIVATE_API_FILE := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/system-private.txt
-endif
-ifndef INTERNAL_PLATFORM_SYSTEM_PRIVATE_DEX_API_FILE
-INTERNAL_PLATFORM_SYSTEM_PRIVATE_DEX_API_FILE := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/system-private-dex.txt
-endif
-
 # Missing optional uses-libraries so that the platform doesn't create build rules that depend on
 # them.
 INTERNAL_PLATFORM_MISSING_USES_LIBRARIES := \
diff --git a/core/soong_droiddoc_prebuilt.mk b/core/soong_droiddoc_prebuilt.mk
index 4e082bf..c0467df 100644
--- a/core/soong_droiddoc_prebuilt.mk
+++ b/core/soong_droiddoc_prebuilt.mk
@@ -12,11 +12,6 @@
 $(LOCAL_MODULE) : $(OUT_DOCS)/$(LOCAL_MODULE)-stubs.srcjar
 endif
 
-ifdef INTERNAL_PLATFORM_API_FILE
-.PHONY: $(LOCAL_MODULE) $(LOCAL_MODULE).txt
-$(LOCAL_MODULE) $(LOCAL_MODULE).txt : $(INTERNAL_PLATFORM_API_FILE) $(INTERNAL_PLATFORM_REMOVED_API_FILE)
-endif
-
 ifdef LOCAL_DROIDDOC_DOC_ZIP
 $(eval $(call copy-one-file,$(LOCAL_DROIDDOC_DOC_ZIP),$(OUT_DOCS)/$(LOCAL_MODULE)-docs.zip))
 $(call dist-for-goals,docs,$(OUT_DOCS)/$(LOCAL_MODULE)-docs.zip)