remove empty bibliography

content/zettels/bumpless_transfer.md

@@ -36,9 +36,3 @@ If the PID is the last element of the chain, its output is \\(u\\) and the track
 
 Filters without integrator (notch, low-pass, lead, lag) have fast dynamics and do not need any tracking.
 The offline chain is simply run in parallel, fed with the same error signal \\(e\\), and its states converge by themselves.
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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>