Remove duplicate BibTeX entry

Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>

Author: ChrisRackauckas

docs/src/refs.bib

@@ -137,16 +137,6 @@ @article{yuan2015recent
   publisher = {Springer}
 }
 
-@article{yuan2015recent,
-  title     = {Recent advances in trust region algorithms},
-  author    = {Yuan, Ya-xiang},
-  journal   = {Mathematical Programming},
-  volume    = {151},
-  pages     = {249--281},
-  year      = {2015},
-  publisher = {Springer}
-}
-
 @article{ziani2008autoadaptative,
   title     = {An autoadaptative limited memory Broyden’s method to solve systems of nonlinear equations},
   author    = {Ziani, Mohammed and Guyomarc’h, Fr{\'e}d{\'e}ric},
@@ -156,4 +146,4 @@ @article{ziani2008autoadaptative
   pages     = {202--211},
   year      = {2008},
   publisher = {Elsevier}
-}
+}