remove all vm.ctx == nil check
remove all vm.ctx == nil check

Signed-off-by: Lai Jiangshan <b337eedf453972390e4695e362aeea2634ef4e0c@gmail.com>

feiskyer/runv,laijs/runv,hyperhq/runv,bergwolf/runv,hyperhq/runv,jinfenw/runv,gao-feng/runv,feiskyer/runv,gnawux/runv,laijs/runv,gnawux/runv,gao-feng/runv,hyperhq/runv,bergwolf/runv,gnawux/runv,gao-feng/runv,jinfenw/runv,laijs/runv,bergwolf/runv,jinfenw/runv