remove empty bibliography

content/zettels/brushless_dc_motor.md

@@ -22,9 +22,3 @@ Tags
 | [Faulhaber](https://www.faulhaber.com/en/products/brushless-dc-motors/)                    |         |
 | [Maxon](https://www.maxongroup.com/maxon/view/content/Overview-brushless-DC-motors)        |         |
 | [OrientalMotors](https://www.orientalmotor.com/brushless-dc-motors-gear-motors/index.html) |         |
-
-
-## Bibliography {#bibliography}
-
-<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
-</div>