feat [UNTESTED]: set removed flags on pools and tokens

internal/handler/index_remove.go

@@ -0,0 +1,11 @@
+package handler
+
+import (
+	"context"
+
+	"github.com/grassrootseconomics/eth-tracker/pkg/event"
+)
+
+func (h *Handler) IndexRemove(ctx context.Context, event event.Event) error {
+	return h.store.RemoveContractAddress(ctx, event)
+}