Upgrade to wpilib alpha-6 (#2434)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Ryanforce08 <rradtke1208@gmail.com>
Co-authored-by: PJ Reiniger <pj.reiniger@gmail.com>
Co-authored-by: Jade Turner <spacey-sooty@proton.me>
Co-authored-by: Matt Morley <matthew.morley.ca@gmail.com>

shared/PhotonVersion.cpp.in

@@ -32,6 +32,5 @@ namespace photon {
 
     // Versions of dependant libraries
     const char* wpilibTargetVersion = "${wpilibVersion}";
-    const char* opencvTargetVersion = "${opencvVersion}";
   }
 }