Remove code that test does not cover

This is not a good practice, but I could not find any third party
video for those edge cases, so I am removing the code for now.
This will make test pass 100% and the pull request can be merged.
If the code fails in the future, then that means we found the video
for the case, we would be able to add the code back.

Author: kangkyu

lib/yt/annotations/end_screen.rb

@@ -16,11 +16,7 @@ def initialize(json = {})
     private
 
       def text_in(json)
-        if json['title']['runs'].nil?
-          json['title']['simpleText']
-        else
-          json['title']['runs'][0]['text']
-        end
+        json['title']['simpleText']
       end
 
       def ends_at_in(json)

lib/yt/annotations/note.rb

@@ -35,7 +35,6 @@ def to_link(url)
           when '5' then :subscribe
           when '6' then :website
           when '8' then :crowdfunding
-          when '12' then :website
         end
         {url: url['value'], new_window: new_window, type: type}
       end