Update releasenotes, as autorefresh won't make it into 0.7

Author: pieter

Documentation/ReleaseNotes/v0.7.txt

@@ -3,7 +3,6 @@ v0.7
 
 This feature-release has the following new features and enhancements:
 
-* Auto-refresh of GitX when the repository is changed (Dave Grijalva)
 * Line-wise staging by selecting lines from hunks (JD Smith)
 * Discarding hunks/changes to files (using git apply --reverse) (Johannes Gilger)
 * Show current HEAD in window-title (Johannes Gilger)