Revert "Add soong_cc_prebuilt.mk"

This reverts commit 1bb943b97c0d1a35032369b39fc007e3b11be4fa.

Reason for revert: broke mac builds
Bug: 113936524

Change-Id: I5b3d8eb1314eb322a5f9c578623ac89e2ad25706
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index f738ab4..07c7e51 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -3,7 +3,6 @@
 ###########################################################
 
 # '',true
-LOCAL_2ND_ARCH_VAR_PREFIX:=
 LOCAL_32_BIT_ONLY:=
 LOCAL_AAPT2_ONLY:=
 LOCAL_AAPT_FLAGS:=
@@ -67,16 +66,13 @@
 LOCAL_DONT_MERGE_MANIFESTS:=
 LOCAL_DPI_FILE_STEM:=
 LOCAL_DPI_VARIANTS:=
-LOCAL_DROIDDOC_ANNOTATIONS_ZIP :=
 LOCAL_DROIDDOC_ASSET_DIR:=
 LOCAL_DROIDDOC_CUSTOM_ASSET_DIR:=
 LOCAL_DROIDDOC_CUSTOM_TEMPLATE_DIR:=
-LOCAL_DROIDDOC_DOC_ZIP :=
 LOCAL_DROIDDOC_HTML_DIR:=
 LOCAL_DROIDDOC_OPTIONS:=
 LOCAL_DROIDDOC_SOURCE_PATH:=
 LOCAL_DROIDDOC_STUB_OUT_DIR:=
-LOCAL_DROIDDOC_STUBS_SRCJAR :=
 LOCAL_DROIDDOC_TEMPLATE_DIR:=
 LOCAL_DROIDDOC_USE_STANDARD_DOCLET:=
 LOCAL_DX_FLAGS:=
@@ -111,7 +107,6 @@
 LOCAL_GTEST:=true
 LOCAL_HAL_STATIC_LIBRARIES:=
 LOCAL_HEADER_LIBRARIES:=
-LOCAL_HOST_PREFIX:=
 LOCAL_HOST_REQUIRED_MODULES:=
 LOCAL_INIT_RC:=
 LOCAL_INSTALLED_MODULE:=
@@ -257,13 +252,13 @@
 LOCAL_SOONG_EXPORT_PROGUARD_FLAGS :=
 LOCAL_SOONG_HEADER_JAR :=
 LOCAL_SOONG_JACOCO_REPORT_CLASSES_JAR :=
-LOCAL_SOONG_LINK_TYPE :=
 LOCAL_SOONG_PROGUARD_DICT :=
 LOCAL_SOONG_RESOURCE_EXPORT_PACKAGE :=
 LOCAL_SOONG_RRO_DIRS :=
 LOCAL_SOONG_STATIC_LIBRARY_EXTRA_PACKAGES :=
-LOCAL_SOONG_TOC :=
-LOCAL_SOONG_UNSTRIPPED_BINARY :=
+LOCAL_DROIDDOC_STUBS_SRCJAR :=
+LOCAL_DROIDDOC_DOC_ZIP :=
+LOCAL_DROIDDOC_ANNOTATIONS_ZIP :=
 # '',true
 LOCAL_SOURCE_FILES_ALL_GENERATED:=
 LOCAL_SRC_FILES:=