typekits: no need to explictely resolve the typekit pkg-config object…

… in Orocos.load_typekit anymore

This actually was harming load times, as we would unconditionally
load the pkg-config object while load_typekit_plugins would do it
only if the typekit was not already loaded.

lib/orocos/typekits.rb

@@ -76,8 +76,7 @@ def self.load_plugin_library(libpath) # :nodoc:
     def self.load_typekit(name)
         @lock.synchronize do
             typekit = default_pkgconfig_loader.typekit_model_from_name(name)
-            typekit_pkg = find_typekit_pkg(name)
-            load_typekit_plugins(name, typekit_pkg)
+            load_typekit_plugins(name)
         end
     end