Remove controversial paragraph

- Seems to contradicty "Tails is free because nobody should have to pay
  to be safe while using computers."
- Makes the text smaller.

wiki/src/donate.html

@@ -28,10 +28,6 @@
   are offering to many others who need it, the very precious tool that
   is Tails.</p>
 
-  <p>We know that secure tools need to be free software to
-  be trustworthy. That's why we are giving out
-  Tails for free but ask for your help to protect and sustain it.</p>
-
   <p>Donations from individuals like you are our most valuable source of funding
   as they make Tails more independent from government and corporate
   funding. We are a very small non-profit and our yearly budget is