Remove presentation.pdf from repo

.gitignore

 # Project specific
-paper.pdf
-llncsdoc.pdf
-article-template.zip
+presentation.pdf
 
 # Created by https://www.gitignore.io/api/visualstudiocode,linux,latex
 # Edit at https://www.gitignore.io/?templates=visualstudiocode,linux,latex

presentation.tex

@@ -3,7 +3,7 @@
 \usepackage[T1]{fontenc}
 \title{There Is No Largest Prime Number}
 \date[ISPN ’80]{27th International Symposium of Prime Numbers}
-\author[Euclid]{Euclid of Alexandria \hfill{\small\texttt{euclid@alexandria.edu}}}
+\author[Euclid]{Euclid of Alexandria {\small\texttt{<euclid@alexandria.edu>}}}
 
 \usetheme{hhubeamer}