Remove errant print statements from tests (backport #13702)

[mergify]

If any print is necessary for debugging failed test cases, we probably ought to reconfigure the test runner's display mechanisms, or use the built-in configuration of the unittest assert methods to produce better results.

Summary

Details and comments

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This is an automatic backport of pull request #13702 done by [Mergify](https://mergify.com).

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[coveralls]

Pull Request Test Coverage Report for Build 12890041282

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 4 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.01%) to 88.935%

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Files with Coverage Reduction	New Missed Lines	%
crates/accelerate/src/unitary_synthesis.rs	1	93.21%
crates/qasm2/src/lex.rs	3	92.48%

Totals
Change from base Build 12866145218:	0.01%
Covered Lines:	79192
Relevant Lines:	89045

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💛 - Coveralls