Revert "split the bibitex files"

This reverts commit c00288abbe.
this doesn't work, it just shows twice the same file. my bad

bib.bib

@@ -31,4 +31,11 @@
         title = "Two notes on notation",
         howpublished = "\url{http://www.example.com}"
         year = "1992",
+}
+
+@misc{ref6,
+        author = "D.E. Knuth",
+        title = "Two notes on notation",
+        howpublished = "\url{http://www.example.com}"
+        year = "1992",
 }

bib2.bib

@@ -1,34 +0,0 @@
-@misc{ref6,
-        author = "D.E. Knuth",
-        title = "Two notes on notation",
-        howpublished = "\url{http://www.example.com}"
-        year = "1992",
-}
-
-@misc{ref7,
-        author = "D.E. Knuth",
-        title = "Two notes on notation",
-        howpublished = "\url{http://www.example.com}"
-        year = "1992",
-}
-
-@misc{ref8,
-        author = "D.E. Knuth",
-        title = "Two notes on notation",
-        howpublished = "\url{http://www.example.com}"
-        year = "1992",
-}
-
-@misc{ref9,
-        author = "D.E. Knuth",
-        title = "Two notes on notation",
-        howpublished = "\url{http://www.example.com}"
-        year = "1992",
-}
-
-@misc{ref10,
-        author = "D.E. Knuth",
-        title = "Two notes on notation",
-        howpublished = "\url{http://www.example.com}"
-        year = "1992",
-}

main.tex

@@ -64,9 +64,4 @@ Hallo Dies ist ein Test
   
 \end{frame}
 
-\begin{frame}{Referenzen}
-  \bibliography{bib2}
-  
-\end{frame}
-
 \end{document}