Remove private method lookup in dpctl_capi

This removes one of static dpctl_capi instance from dpctl_capi definition.
This leaves a single static instance created dynamically in get static method.

Author: oleksandr-pavlyk

dpctl/apis/include/dpctl4pybind11.hpp

@@ -181,7 +181,7 @@ class dpctl_capi
 
     static auto &get()
     {
-        static dpctl_capi api = lookup();
+        static dpctl_capi api{};
         return api;
     }
 
@@ -404,12 +404,6 @@ class dpctl_capi
     dpctl_capi &operator=(dpctl_capi const &) = default;
     dpctl_capi &operator=(dpctl_capi &&) = default;
 
-    static dpctl_capi &lookup()
-    {
-        static dpctl_capi api;
-        return api;
-    }
-
 }; // struct dpctl_capi
 } // namespace detail
 } // namespace dpctl