Remove dead code identified by deadcode tool (#37271)

Ran [`deadcode`](https://pkg.go.dev/golang.org/x/tools/cmd/deadcode)
(`-test ./...`) to find functions, methods and error types unreachable
from any call path (including tests), and removed the truly-dead ones.

Co-authored-by: Claude (Opus 4.7) <noreply@anthropic.com>

routers/web/org/projects.go

@@ -35,14 +35,6 @@ const (
 	tplProjectsView templates.TplName = "org/projects/view"
 )
 
-// MustEnableProjects check if projects are enabled in settings
-func MustEnableProjects(ctx *context.Context) {
-	if unit.TypeProjects.UnitGlobalDisabled() {
-		ctx.NotFound(nil)
-		return
-	}
-}
-
 // Projects renders the home page of projects
 func Projects(ctx *context.Context) {
 	if _, err := shared_user.RenderUserOrgHeader(ctx); err != nil {