remove jekyll-redirect-from from root pages

Due to how Jekyll is designed, this plugin won't ever work.

_pages/en_US/contribute.txt

@@ -1,7 +1,5 @@
 ---
 title: "Contribute"
-redirect_from:
-  - donations
 ---
 
 We're glad to hear that you'd like to contribute to 3ds.hacks.guide! Here are a few ways that you can do so:

_pages/en_US/restoring-updating-cfw.txt

@@ -1,7 +1,5 @@
 ---
 title: "Restoring / Updating CFW"
-redirect_from:
-  - restoring-cfw
 ---
 
 {% include toc title="Table of Contents" %}