remove empty bibliography

content/zettels/mass_spring_damper_systems.md

@@ -189,9 +189,3 @@ The transfer functions from \\(F\_2\\) to the mass displacements are shown in [F
 <a id="figure--fig:mass-spring-damper-flex-above"></a>
 
 {{< figure src="/ox-hugo/mass_spring_damper_flex_above.png" caption="<span class='figure-number'>Figure 8: </span>2 DoF Mass Spring Damper system" >}}
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-## Bibliography {#bibliography}
-
-<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
-</div>