buildstep: BuildModuleOf goes, a build module is the holder of its build seat on the seat list

No caller is left (the checker, the watchman and the view find the holders; the builder's reader looks a step up by its seat).

Builds: design 47 G A-82
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h

modules/mesh-delivery-builder/cmd/mesh-delivery-builder/assignments.go

@@ -1,41 +0,0 @@
-package main
-
-import (
-	"context"
-	"time"
-
-	mma "git.novox.be/novox/mesh-contracts/go/seats/meshmoduleassigner"
-	"git.novox.be/novox/mesh-sdk/go/seatlist"
-)
-
-// assignerHolder is the module holding the seat mesh-module-assigner now, asked of the seat list through mesh-sdk's seatlist.HolderOf
-// until it answers or ctx ends (design 47 G A-119, A-126): the builder names no assigner module, so a new holder is followed with no
-// change of code. wait is the pause between two asks that failed; sleep says false when ctx ended during it.
-func assignerHolder(ctx context.Context, call seatlist.HolderCaller, wait time.Duration, sleep func(context.Context, time.Duration) bool, logf func(string, ...any)) (string, bool) {
-	for {
-		holder, err := seatlist.HolderOf(call, mma.Seat)
-		if err == nil {
-			return holder, true
-		}
-		logf("who holds the seat %s is not known yet, so no node is counted by the assignments: %v", mma.Seat, err)
-		if !sleep(ctx, wait) {
-			return "", false
-		}
-	}
-}
-
-// assignmentsNames are the names made from the holder: the view's first-view tool `<holder>.assignments` and the
-// bucket `<holder>_assignments` of the state, both made from the holder found at run time.
-type assignmentsNames struct{ Holder, Tool, Bucket string }
-
-func assignmentsOf(holder string) assignmentsNames {
-	return assignmentsNames{Holder: holder, Tool: holder + "." + mma.StateAssignments, Bucket: holder + "_" + mma.StateAssignments}
-}
-
-// sleepFor waits d, a context's bound, and says whether ctx is still alive.
-func sleepFor(ctx context.Context, d time.Duration) bool {
-	w, cancel := context.WithTimeout(ctx, d)
-	defer cancel()
-	<-w.Done()
-	return ctx.Err() == nil
-}