Apple hopes that the flashy new features of the iPhone 7, which it is expected to introduce in September, will convince customers to abandon older models.

请问：句中的 it 是不是多余的？

▲句子语法结构分析如下：

主句主语：Apple

主句的谓语：hopes

引导宾语从句的连词：that

宾语从句的主语：the flashy new features of the iPhone 7

修饰宾语从句主语的定语从句：which it is expected to introduce in September

宾语从句的谓语：will convince

宾语从句的宾语：customers

宾语从句宾语补足语：to abandon older models（动词不定式充当）

▲另外也把修饰宾语从句主语的定语从句语法结构也分析如下：

引导定语从句关系代词：which(指代前面先行词 the flashy new features of the iPhone7)

定语从句主语：it

定语从句谓语：is expected

定语从句主语补足语：to introduce in September（动词不定式充当）

▲特别备注：关系代词 which 作不定式的 to introduce 宾语。