remove empty bibliography

content/zettels/linear_brushless_motor.md

@@ -55,9 +55,3 @@ Vacuum compatible linear motors:
 | [Chieftek](http://www.chieftek.com/product-cls.asp)                                                              | Taiwan  |
 | [Transtechnik](https://www.transtechnik.fr/range/gamme-de-moteurs-lineaires-avec-mecanique-de-guidage-integree/) | France  |
 | [Monticont](http://www.pwr-con.com/ecommerce/default.asp?cat=Linear+Brushless+Motor+Driven+Stage)                |         |
-
-
-## Bibliography {#bibliography}
-
-<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
-</div>