Revert "Consider root and current section's content type if set in front matter"

This reverts commit c790029e1d.

output/layout.go

@@ -35,12 +35,6 @@ type LayoutDescriptor struct {
 	Kind    string
 	Lang    string
 	Layout  string
-
-	// Any potential type set in the page's current section and the root section
-	// it lives in.
-	TypeFirstSection    string
-	TypeCurrentSection string
-
 	// LayoutOverride indicates what we should only look for the above layout.
 	LayoutOverride bool
 }
@@ -133,14 +127,6 @@ func resolvePageTemplate(d LayoutDescriptor, f Format) []string {
 		b.addTypeVariations(d.Type)
 	}
 
-	if d.TypeCurrentSection != "" {
-		b.addTypeVariations(d.TypeCurrentSection)
-	}
-
-	if d.TypeFirstSection != "" {
-		b.addTypeVariations(d.TypeFirstSection)
-	}
-
 	switch d.Kind {
 	case "page":
 		b.addLayoutVariations("single")