Are you talking about Ludei's splash screen ? You can import one in the configuration settings before you compile your project but it won't get rid of Ludei's Splash Screen as it is mandatory at the moment & their gonna be introducing a paid service soon that'll include the option to get rid of it .
If your talking about the loading screen from C2 - That'll always show up when the user is playing the game for the first time, its installing the C2 engine (I believe) at that moment . After the game has loaded for the very first time, it won't be there the next time you play . Because the C2 engine has already installed, for that reason their isnt really a need for a loading bar since nothing is loading, you could make your first layout your splash screen tho & add the loading bar object to it. *That might look strange to those playing your game for the first time because theyll be seeing two loading bars before they even see or click a "Start Game" button - some users might go as far as deleting the game after the first time playing under the assumption that everytime they play there gonna have to go thru two load screens not to mention Ludei's Splash screen.
But again if you insist - use the loading bar object (in C2) & add that to your first layout - you can't get rid of ludei's splash screen till they roll out their paid subscription service