Don't use -f with rm.

We rather see a fatal failure here e.g. if the file we want to remove
has moved.

config/chroot_local-includes/usr/local/lib/tails-shell-library/chroot-browser.sh

@@ -194,7 +194,7 @@ configure_chroot_browser () {
     cp /usr/share/tails/"${browser_name}"/userChrome.css "${browser_chrome}"
 
     # Remove all bookmarks
-    rm -f "${chroot}/${TBB_PROFILE}/bookmarks.html"
+    rm "${chroot}/${TBB_PROFILE}/bookmarks.html"
 
     # Set an appropriate theme, except if we're using Windows
     # camouflage.