remove useless flaky asserts #1101

Job	Run time
static analysis (Elixir 1.15.x \| Erlang/OTP 25.x)	20s
mix test windows (Elixir 1.13.x \| Erlang/OTP 22.x)	9m 21s
mix test windows (Elixir 1.13.x \| Erlang/OTP 23.x)	8m 39s
mix test (Elixir 1.12.x \| Erlang/OTP 22.x)	5m 19s
mix test windows (Elixir 1.13.x \| Erlang/OTP 24.x)	4m 51s
mix test windows (Elixir 1.13.x \| Erlang/OTP 25.x)	4m 30s
mix test (Elixir 1.12.x \| Erlang/OTP 23.x)	5m 46s
mix test windows (Elixir 1.14.x \| Erlang/OTP 23.x)	6m 35s
mix test (Elixir 1.12.x \| Erlang/OTP 24.x)	3m 44s
mix test windows (Elixir 1.14.x \| Erlang/OTP 24.x)	9m 52s
mix test (Elixir 1.13.x \| Erlang/OTP 22.x)	4m 14s
mix test windows (Elixir 1.14.x \| Erlang/OTP 25.x)	4m 14s
mix test (Elixir 1.13.x \| Erlang/OTP 23.x)	7m 36s
mix test windows (Elixir 1.14.x \| Erlang/OTP 26.x)	6m 17s
mix test (Elixir 1.13.x \| Erlang/OTP 24.x)	4m 48s
mix test windows (Elixir 1.15.x \| Erlang/OTP 24.x)	4m 58s
mix test (Elixir 1.13.x \| Erlang/OTP 25.x)	3m 8s
mix test windows (Elixir 1.15.x \| Erlang/OTP 25.x)	4m 46s
mix test windows (Elixir 1.15.x \| Erlang/OTP 26.x)	4m 40s
mix test (Elixir 1.14.x \| Erlang/OTP 23.x)	5m 12s
mix test (Elixir 1.14.x \| Erlang/OTP 24.x)	3m 20s
mix test (Elixir 1.14.x \| Erlang/OTP 25.x)	5m 20s
mix test (Elixir 1.14.x \| Erlang/OTP 26.x)	4m 48s
mix test (Elixir 1.15.x \| Erlang/OTP 24.x)	4m 44s
mix test (Elixir 1.15.x \| Erlang/OTP 25.x)	3m 8s
mix test (Elixir 1.15.x \| Erlang/OTP 26.x)	3m 24s
	2h 13m 34s

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