Remove debugging slow assert statement (#7221)

* Remove debugging slow assert statement

* Add a benchmark

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Update asv_bench/benchmarks/dataset_creation.py

* Rework the benchmark

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Delete dataset_creation.py

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Illviljan <14371165+Illviljan@users.noreply.github.com>
Co-authored-by: Deepak Cherian <dcherian@users.noreply.github.com>

Author: 4 people

xarray/core/alignment.py

@@ -846,12 +846,6 @@ def is_alignable(obj):
         else:
             out[position][key] = aligned_obj  # type: ignore[index]  # maybe someone can fix this?
 
-    # something went wrong: we should have replaced all sentinel values
-    for arg in out:
-        assert arg is not not_replaced
-        if is_dict_like(arg):
-            assert all(value is not not_replaced for value in arg.values())
-
     return out