remove maxFeasibleMessageLen check
remove maxFeasibleMessageLen check

since the root cause got fixed by 3cd199e85

tomwilkie/weave,dpw/weave,dpw/weave,weaveworks/weave,tomwilkie/weave,weaveworks/weave,rade/weave,n054/weave,n054/weave,paulbellamy/weave,paulbellamy/weave,paulbellamy/weave,paulbellamy/weave,weaveworks/weave,rade/weave,tomwilkie/weave,dpw/weave,rade/weave,dpw/weave,n054/weave,weaveworks/weave,rade/weave,rade/weave,n054/weave,n054/weave,tomwilkie/weave,tomwilkie/weave,dpw/weave