[Installer] Use #dependent_targets

lib/cocoapods/installer.rb

@@ -660,14 +660,7 @@ module Pod
           aggregate_target.native_target.add_dependency(pod_target.native_target)
           configure_app_extension_api_only_for_target(pod_target) if is_app_extension
 
-          pod_target.dependencies.each do |dep|
-            unless dep == pod_target.pod_name
-              pod_dependency_target = aggregate_target.pod_targets.find { |target| target.pod_name == dep }
-              # TODO: remove me
-              unless pod_dependency_target
-                puts "[BUG] DEP: #{dep}"
-              end
-
+          pod_target.dependent_targets.each do |pod_dependency_target|
             next unless pod_dependency_target.should_build?
             pod_target.native_target.add_dependency(pod_dependency_target.native_target)
             configure_app_extension_api_only_for_target(pod_dependency_target) if is_app_extension
@@ -681,7 +674,6 @@ module Pod
         end
       end
     end
-    end
 
     # Writes the Pods project to the disk.
     #