Revert "Add Android.bp.list and soong.variables to inputs for soong_docs action"

This reverts commit 67eee7cae4.

Reason for revert: Broke renderscript build

Change-Id: Ie26b3c7a78afe44d719f399520e643174109593f

android/writedocs.go

@@ -44,10 +44,6 @@ func primaryBuilderPath(ctx SingletonContext) Path {
 }
 
 func (c *docsSingleton) GenerateBuildActions(ctx SingletonContext) {
-	var deps Paths
-	deps = append(deps, pathForBuildToolDep(ctx, ctx.Config().moduleListFile))
-	deps = append(deps, pathForBuildToolDep(ctx, ctx.Config().ProductVariablesFileName))
-
 	// Generate build system docs for the primary builder.  Generating docs reads the source
 	// files used to build the primary builder, but that dependency will be picked up through
 	// the dependency on the primary builder itself.  There are no dependencies on the
@@ -67,7 +63,6 @@ func (c *docsSingleton) GenerateBuildActions(ctx SingletonContext) {
 	ctx.Build(pctx, BuildParams{
 		Rule:   soongDocs,
 		Output: docsFile,
-		Inputs: deps,
 		Args: map[string]string{
 			"outDir": PathForOutput(ctx, "docs").String(),
 		},