Remove unreachable functions from import_shared.go (bd-18)

- Removed renameImportedIssuePrefixes and supporting functions
- Removed unused imports (fmt, sort, strings, utils)
- Saved ~130 LOC of dead code
- All tests pass

cmd/bd/import_shared.go

@@ -2,14 +2,10 @@ package main
 
 import (
 	"context"
-	"fmt"
-	"sort"
-	"strings"
 
 	"github.com/steveyegge/beads/internal/importer"
 	"github.com/steveyegge/beads/internal/storage"
 	"github.com/steveyegge/beads/internal/types"
-	"github.com/steveyegge/beads/internal/utils"
 )
 
 // fieldComparator handles comparison logic for a specific field type
@@ -228,136 +224,6 @@ func importIssuesCore(ctx context.Context, dbPath string, store storage.Storage,
 }
 
 
-
-// renameImportedIssuePrefixes renames all issues and their references to match the target prefix
-func renameImportedIssuePrefixes(issues []*types.Issue, targetPrefix string) error {
-	// Build a mapping of old IDs to new IDs
-	idMapping := make(map[string]string)
-
-	for _, issue := range issues {
-		oldPrefix := utils.ExtractIssuePrefix(issue.ID)
-		if oldPrefix == "" {
-			return fmt.Errorf("cannot rename issue %s: malformed ID (no hyphen found)", issue.ID)
-		}
-
-		if oldPrefix != targetPrefix {
-			// Extract the numeric part
-			numPart := strings.TrimPrefix(issue.ID, oldPrefix+"-")
-			
-			// Validate that the numeric part is actually numeric
-			if numPart == "" || !isNumeric(numPart) {
-				return fmt.Errorf("cannot rename issue %s: non-numeric suffix '%s'", issue.ID, numPart)
-			}
-			
-			newID := fmt.Sprintf("%s-%s", targetPrefix, numPart)
-			idMapping[issue.ID] = newID
-		}
-	}
-	
-	// Now update all issues and their references
-	for _, issue := range issues {
-		// Update the issue ID itself if it needs renaming
-		if newID, ok := idMapping[issue.ID]; ok {
-			issue.ID = newID
-		}
-		
-		// Update all text references in issue fields
-		issue.Title = replaceIDReferences(issue.Title, idMapping)
-		issue.Description = replaceIDReferences(issue.Description, idMapping)
-		if issue.Design != "" {
-			issue.Design = replaceIDReferences(issue.Design, idMapping)
-		}
-		if issue.AcceptanceCriteria != "" {
-			issue.AcceptanceCriteria = replaceIDReferences(issue.AcceptanceCriteria, idMapping)
-		}
-		if issue.Notes != "" {
-			issue.Notes = replaceIDReferences(issue.Notes, idMapping)
-		}
-		
-		// Update dependency references
-		for i := range issue.Dependencies {
-			if newID, ok := idMapping[issue.Dependencies[i].IssueID]; ok {
-				issue.Dependencies[i].IssueID = newID
-			}
-			if newID, ok := idMapping[issue.Dependencies[i].DependsOnID]; ok {
-				issue.Dependencies[i].DependsOnID = newID
-			}
-		}
-		
-		// Update comment references
-		for i := range issue.Comments {
-			issue.Comments[i].Text = replaceIDReferences(issue.Comments[i].Text, idMapping)
-		}
-	}
-	
-	return nil
-}
-
-// replaceIDReferences replaces all old issue ID references with new ones in text
-// Uses boundary-aware matching to avoid partial replacements (e.g., wy-1 inside wy-10)
-func replaceIDReferences(text string, idMapping map[string]string) string {
-	if len(idMapping) == 0 {
-		return text
-	}
-	
-	// Sort old IDs by length descending to handle longer IDs first
-	// This prevents "wy-1" from being replaced inside "wy-10"
-	oldIDs := make([]string, 0, len(idMapping))
-	for oldID := range idMapping {
-		oldIDs = append(oldIDs, oldID)
-	}
-	sort.Slice(oldIDs, func(i, j int) bool {
-		return len(oldIDs[i]) > len(oldIDs[j])
-	})
-	
-	result := text
-	for _, oldID := range oldIDs {
-		newID := idMapping[oldID]
-		// Replace with boundary checking
-		result = replaceBoundaryAware(result, oldID, newID)
-	}
-	return result
-}
-
-// replaceBoundaryAware replaces oldID with newID only when surrounded by boundaries
-func replaceBoundaryAware(text, oldID, newID string) string {
-	if !strings.Contains(text, oldID) {
-		return text
-	}
-	
-	var result strings.Builder
-	result.Grow(len(text))
-	
-	for i := 0; i < len(text); {
-		// Check if we match oldID at this position
-		if strings.HasPrefix(text[i:], oldID) {
-			// Check boundaries before and after
-			beforeOK := i == 0 || isBoundary(text[i-1])
-			afterOK := (i+len(oldID) >= len(text)) || isBoundary(text[i+len(oldID)])
-			
-			if beforeOK && afterOK {
-				// Valid match - replace
-				result.WriteString(newID)
-				i += len(oldID)
-				continue
-			}
-		}
-		
-		// Not a match or invalid boundaries - keep original character
-		result.WriteByte(text[i])
-		i++
-	}
-	
-	return result.String()
-}
-
-// isBoundary returns true if the character is not part of an issue ID
-func isBoundary(c byte) bool {
-	// Issue IDs contain: lowercase letters, digits, and hyphens
-	// Boundaries are anything else (space, punctuation, etc.)
-	return (c < 'a' || c > 'z') && (c < '0' || c > '9') && c != '-'
-}
-
 // isNumeric returns true if the string contains only digits
 func isNumeric(s string) bool {
 	for i := 0; i < len(s); i++ {