Revert "Add prebuilt_build_tool to allow genrules to use prebuil..."

Revert submission 1366377-prebuilt_build_tool_make

Reason for revert: breaks build
Reverted Changes:
I20bf062bb:Export prebuilt tools to Make
I4bb526492:Move some prebuilt build tool configs to Soong
I195b68813:Support per-module MakeVars
Ibcb257e7b:Fix dependency loop with flex
I6150f0f39:Switch cc's use of bison and flex to prebuilt_buil...
I6939451b8:Reland "Use genrules to build a consistent awk."
Idee60640f:Add prebuilt_build_tool modules for genrule use
I00893172b:Rename bison to bison_bin
I82c26be1c:Add prebuilt_build_tool to allow genrules to use p...

Change-Id: I6b3acf306d355f3e0463564c9ebe9482fa0f609e

android/Android.bp

@@ -39,7 +39,6 @@ bootstrap_go_package {
         "paths.go",
         "phony.go",
         "prebuilt.go",
-        "prebuilt_build_tool.go",
         "proto.go",
         "register.go",
         "rule_builder.go",

android/defs.go

@@ -69,7 +69,7 @@ var (
 	// A symlink rule.
 	Symlink = pctx.AndroidStaticRule("Symlink",
 		blueprint.RuleParams{
-			Command:     "rm -f $out && ln -f -s $fromPath $out",
+			Command:     "ln -f -s $fromPath $out",
 			Description: "symlink $out",
 		},
 		"fromPath")

android/prebuilt_build_tool.go

@@ -1,94 +0,0 @@
-// Copyright 2020 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package android
-
-import (
-	"path"
-	"path/filepath"
-)
-
-func init() {
-	RegisterModuleType("prebuilt_build_tool", prebuiltBuildToolFactory)
-}
-
-type prebuiltBuildToolProperties struct {
-	// Source file to be executed for this build tool
-	Src *string `android:"path,arch_variant"`
-
-	// Extra files that should trigger rules using this tool to rebuild
-	Deps []string `android:"path,arch_variant"`
-}
-
-type prebuiltBuildTool struct {
-	ModuleBase
-	prebuilt Prebuilt
-
-	properties prebuiltBuildToolProperties
-
-	toolPath OptionalPath
-}
-
-func (t *prebuiltBuildTool) Name() string {
-	return t.prebuilt.Name(t.ModuleBase.Name())
-}
-
-func (t *prebuiltBuildTool) Prebuilt() *Prebuilt {
-	return &t.prebuilt
-}
-
-func (t *prebuiltBuildTool) DepsMutator(ctx BottomUpMutatorContext) {
-	if t.properties.Src == nil {
-		ctx.PropertyErrorf("src", "missing prebuilt source file")
-	}
-}
-
-func (t *prebuiltBuildTool) GenerateAndroidBuildActions(ctx ModuleContext) {
-	sourcePath := t.prebuilt.SingleSourcePath(ctx)
-	installedPath := PathForModuleOut(ctx, t.ModuleBase.Name())
-	deps := PathsForModuleSrc(ctx, t.properties.Deps)
-
-	relPath, err := filepath.Rel(path.Dir(installedPath.String()), sourcePath.String())
-	if err != nil {
-		ctx.ModuleErrorf("Unabled to generate symlink between %q and %q: %s", installedPath.String(), sourcePath.String())
-	}
-
-	ctx.Build(pctx, BuildParams{
-		Rule:      Symlink,
-		Output:    installedPath,
-		Input:     sourcePath,
-		Implicits: deps,
-		Args: map[string]string{
-			"fromPath": relPath,
-		},
-	})
-
-	t.toolPath = OptionalPathForPath(installedPath)
-}
-
-func (t *prebuiltBuildTool) HostToolPath() OptionalPath {
-	return t.toolPath
-}
-
-var _ HostToolProvider = &prebuiltBuildTool{}
-
-// prebuilt_build_tool is to declare prebuilts to be used during the build, particularly for use
-// in genrules with the "tools" property.
-func prebuiltBuildToolFactory() Module {
-	module := &prebuiltBuildTool{}
-	module.AddProperties(&module.properties)
-	InitSingleSourcePrebuiltModule(module, &module.properties, "Src")
-	InitAndroidArchModule(module, HostSupportedNoCross, MultilibFirst)
-	return module
-}