Cleanup: Remove obsolete (Make)EnumPropsT. (#10697)

This was used by the command system to help extract p1/p2 parameters, which no longer happens.

src/company_type.h

@@ -45,9 +45,6 @@ static const uint MAX_COMPANY_SHARE_OWNERS        =  4; ///< The maximum number
 static const uint MIN_COMPETITORS_INTERVAL = 0;   ///< The minimum interval (in minutes) between competitors.
 static const uint MAX_COMPETITORS_INTERVAL = 500; ///< The maximum interval (in minutes) between competitors.
 
-/** Define basic enum properties */
-template <> struct EnumPropsT<Owner> : MakeEnumPropsT<Owner, byte, OWNER_BEGIN, OWNER_END, INVALID_OWNER> {};
-
 typedef Owner CompanyID;
 
 typedef uint16 CompanyMask;