Update Project.toml

Author: ChrisRackauckas

Project.toml

@@ -9,7 +9,6 @@ DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
 Git = "d7ba0133-e1db-5d97-8f8c-041e4b3a1eb2"
 IJulia = "7073ff75-c697-5162-941a-fcdaad2a7d2a"
 InteractiveUtils = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
-Ipopt = "b6b21f68-93f8-5de0-b562-5493be1d77c9"
 Markdown = "d6f4376e-aef5-505a-96c1-9c027394607a"
 OMJulia = "0f4fe800-344e-11e9-2949-fb537ad918e1"
 Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"