Revert "Allow processing square buffers." #1219

Job	Run time
Lint C++	37s
Pre-build on macos-13 with clang	3m 58s
Pre-build on ubuntu-20.04 with clang	1m 44s
Lint Python (3.12, ubuntu-20.04)	7s
Pre-build on ubuntu-20.04 with gcc	1m 30s
Build wheel for ${{ matrix.build }}	0s
Test 1 / 8 with Python 3.12 on ubuntu-20.04	1m 13s
Test 2 / 8 with Python 3.12 on ubuntu-20.04	1m 23s
Test 3 / 8 with Python 3.12 on ubuntu-20.04	1m 23s
Test 4 / 8 with Python 3.12 on ubuntu-20.04	1m 20s
Test 5 / 8 with Python 3.12 on ubuntu-20.04	1m 17s
Test 6 / 8 with Python 3.12 on ubuntu-20.04	1m 46s
Test 7 / 8 with Python 3.12 on ubuntu-20.04	1m 42s
Test 8 / 8 with Python 3.12 on ubuntu-20.04	1m 21s
Test with Python 3.7 + Address Sanitizer	8m 16s
Test with Python 3.8 + Address Sanitizer	8m 24s
Test with Python 3.9 + Address Sanitizer	8m 28s
Test with Python 3.10 + Address Sanitizer	8m 31s
Test with Python 3.11 + Address Sanitizer	8m 16s
Test with Python 3.7 on macos-13	11m 8s
Test with Python 3.8 on macos-13	10m 48s
Test with Python 3.9 on macos-13	10m 22s
Test with Python 3.10 on macos-13	10m 47s
Test with Python 3.11 on macos-13	12m 11s
Test with Python 3.12 on macos-13	10m 21s
Test with Python 3.7 on ubuntu-20.04	5m 22s
Test with Python 3.8 on ubuntu-20.04	5m 42s
Test with Python 3.9 on ubuntu-20.04	5m 45s
Test with Python 3.10 on ubuntu-20.04	5m 49s
Test with Python 3.11 on ubuntu-20.04	5m 30s
Test with Python 3.12 on ubuntu-20.04	5m 27s
Test with Python 3.12 on windows-latest	9m 54s
Upload wheels to PyPI	0s
	2h 50m 22s

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