remove unused GeneratedHeaders variable

Even though modules listed in generated_headers may produce .h files and
return the list of them as GeneratedSourceFiles(), cc modules do not
need them. GeneratedDeps() and GeneratedHeaderDirs() are what we need.

Bug: n/a
Test: m
Change-Id: I655f88e8c1a387e256c58913931721aaeab90b62
diff --git a/cc/cc.go b/cc/cc.go
index 0a23967..5f774c9 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -136,7 +136,6 @@
 
 	// Paths to generated source files
 	GeneratedSources android.Paths
-	GeneratedHeaders android.Paths
 	GeneratedDeps    android.Paths
 
 	Flags                      []string
@@ -2228,8 +2227,6 @@
 				fallthrough
 			case genHeaderDepTag, genHeaderExportDepTag:
 				if genRule, ok := dep.(genrule.SourceFileGenerator); ok {
-					depPaths.GeneratedHeaders = append(depPaths.GeneratedHeaders,
-						genRule.GeneratedSourceFiles()...)
 					depPaths.GeneratedDeps = append(depPaths.GeneratedDeps,
 						genRule.GeneratedDeps()...)
 					dirs := genRule.GeneratedHeaderDirs()
@@ -2417,7 +2414,6 @@
 			if _, ok := ccDep.(*Module); ok {
 				if i, ok := ccDep.(*Module).linker.(exportedFlagsProducer); ok {
 					depPaths.SystemIncludeDirs = append(depPaths.SystemIncludeDirs, i.exportedSystemDirs()...)
-					depPaths.GeneratedHeaders = append(depPaths.GeneratedHeaders, i.exportedGeneratedHeaders()...)
 					depPaths.GeneratedDeps = append(depPaths.GeneratedDeps, i.exportedDeps()...)
 					depPaths.Flags = append(depPaths.Flags, i.exportedFlags()...)
 
@@ -2647,7 +2643,6 @@
 	depPaths.Flags = android.FirstUniqueStrings(depPaths.Flags)
 	depPaths.IncludeDirs = android.FirstUniquePaths(depPaths.IncludeDirs)
 	depPaths.SystemIncludeDirs = android.FirstUniquePaths(depPaths.SystemIncludeDirs)
-	depPaths.GeneratedHeaders = android.FirstUniquePaths(depPaths.GeneratedHeaders)
 	depPaths.GeneratedDeps = android.FirstUniquePaths(depPaths.GeneratedDeps)
 	depPaths.ReexportedDirs = android.FirstUniquePaths(depPaths.ReexportedDirs)
 	depPaths.ReexportedSystemDirs = android.FirstUniquePaths(depPaths.ReexportedSystemDirs)