remove empty bibliography

content/zettels/nyquist_stability_criterion.md

@@ -67,9 +67,3 @@ end
 
 Then, compute the eigenvalues of this open-loop gain:
 Finally, plot the (complex) eigenvalues in the complex plane:
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-## Bibliography {#bibliography}
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-<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
-</div>