Revert "Include proguard flag files from transitive java_library deps"

This reverts commit 9c54f032b9.

Reason for revert: b/262940536

Bug: b/262940536
Change-Id: I8140eacc7ca8716f799561412cb5cef29df35d29

java/java.go

@@ -283,11 +283,6 @@ type UsesLibraryDependency interface {
 	ClassLoaderContexts() dexpreopt.ClassLoaderContextMap
 }
 
-// Provides transitive Proguard flag files to downstream DEX jars.
-type LibraryDependency interface {
-	ExportedProguardFlagFiles() android.Paths
-}
-
 // TODO(jungjw): Move this to kythe.go once it's created.
 type xref interface {
 	XrefJavaFiles() android.Paths
@@ -590,17 +585,9 @@ func normalizeJavaVersion(ctx android.BaseModuleContext, javaVersion string) jav
 type Library struct {
 	Module
 
-	exportedProguardFlagFiles android.Paths
-
 	InstallMixin func(ctx android.ModuleContext, installPath android.Path) (extraInstallDeps android.Paths)
 }
 
-var _ LibraryDependency = (*Library)(nil)
-
-func (j *Library) ExportedProguardFlagFiles() android.Paths {
-	return j.exportedProguardFlagFiles
-}
-
 var _ android.ApexModule = (*Library)(nil)
 
 // Provides access to the list of permitted packages from apex boot jars.
@@ -696,15 +683,6 @@ func (j *Library) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 		}
 		j.installFile = ctx.InstallFile(installDir, j.Stem()+".jar", j.outputFile, extraInstallDeps...)
 	}
-
-	j.exportedProguardFlagFiles = append(j.exportedProguardFlagFiles,
-		android.PathsForModuleSrc(ctx, j.dexProperties.Optimize.Proguard_flags_files)...)
-	ctx.VisitDirectDeps(func(m android.Module) {
-		if lib, ok := m.(LibraryDependency); ok && ctx.OtherModuleDependencyTag(m) == staticLibTag {
-			j.exportedProguardFlagFiles = append(j.exportedProguardFlagFiles, lib.ExportedProguardFlagFiles()...)
-		}
-	})
-	j.exportedProguardFlagFiles = android.FirstUniquePaths(j.exportedProguardFlagFiles)
 }
 
 func (j *Library) DepsMutator(ctx android.BottomUpMutatorContext) {