Update section behavior

diary.go

@@ -10,7 +10,6 @@ import (
 	"os"
 	"path"
 	"path/filepath"
-	"regexp"
 	"sort"
 	"strconv"
 	"strings"
@@ -208,22 +207,6 @@ func findDiaryContext(root, fsPath, urlPath string) (depth int, diaryRootFS, dia
 	return 0, "", "", false
 }
 
-// headingTextRe matches an ATX heading at the start of a section. The
-// heading text is everything after the `#`s and the required space, on the
-// first line.
-var headingTextRe = regexp.MustCompile(`^(#{1,6})\s+([^\n]*)`)
-
-// sectionHeading returns the heading level (1..6) and trimmed text of a
-// section produced by splitSections. Returns level=0 for the pre-heading
-// section (index 0).
-func sectionHeading(section []byte) (level int, text string) {
-	m := headingTextRe.FindSubmatch(section)
-	if m == nil {
-		return 0, ""
-	}
-	return len(m[1]), strings.TrimSpace(string(m[2]))
-}
-
 // findSectionIndex returns the absolute section index whose heading text
 // matches target (e.g. "2026-05" or "2026-05-28"). Returns the first match.
 func findSectionIndex(sections [][]byte, target string) (int, bool) {