[clang] [Clang][Sema] Don't assert on mismatched array type in decomposition-decl fast path (PR #210964)

[Shengxin Pei via cfe-commits]

https://github.com/TPPPP72 commented:

I'm thinking that since `array_type [a, b, c]{arr}` is not valid syntax, theoretically it shouldn't trigger this function. Removing the assert should provide a clear justification.I don't find the current explanation very convincing.

https://github.com/llvm/llvm-project/pull/210964