Update improving-your-writing.md

group-syllabus/improving-your-writing.md

@@ -201,7 +201,6 @@ Over the years, I found the documents below helpful for improving my writing:
 * [Writing a science paper some dos and don'ts](https://www.elsevier.com/connect/writing-a-science-paper-some-dos-and-donts)
 * [Experimental Biosciences writing science](http://www.ruf.rice.edu/~bioslabs/tools/report/reportform.html)
 * [11 steps to structuring a science paper editors will take seriously](https://www.elsevier.com/connect/11-steps-to-structuring-a-science-paper-editors-will-take-seriously)
-* Writing lab (ENV385w) notes by [Katharyn Duffy](https://github.com/katharynduffy)
 * [Strunk and Write](https://www.amazon.com/Elements-Style-Fourth-William-Strunk/dp/020530902X) is a classical book that describes common writing gaffs and style particulars. 
 * [Move over Strunk and White: My all-time favorite books on writing](https://clauswilke.com/blog/2017/11/12/move-over-strunk-and-white/)