Revert "hugolib: Fix potential server panic with drafts/future enabled"

This had a side-effect. I have understand this better to apply the correct fix. Will come soon.

This reverts commit 1ab4658c0d.

hugolib/site.go

@@ -1511,19 +1511,12 @@ func (s *Site) resetBuildState() {
 
 	spc = newPageCache()
 
-	initPage := func(p *Page) {
+	for _, p := range s.rawAllPages {
 		p.subSections = Pages{}
 		p.parent = nil
 		p.scratch = maps.NewScratch()
 		p.mainPageOutput = nil
 	}
-
-	for _, p := range s.Pages {
-		initPage(p)
-	}
-	for _, p := range s.headlessPages {
-		initPage(p)
-	}
 }
 
 func (s *Site) kindFromSections(sections []string) string {