Revert vimperator to auto-fade flash messages

We can no longer set our URL to the left hand side, so there is no
longer any real need to prevent auto-fading.

We also remove map leader, because it is unused for now.

vimperator/vimperatorrc

@@ -10,7 +10,7 @@ colorscheme cinaeco
 set focuscontent
 
 " don't fade out messages, instead just <Esc> to clear
-set messagetimeout=-1
+" set messagetimeout=-1
 
 " use DuckDuckGo plugin
 set defsearch=duckduckgo
@@ -20,8 +20,6 @@ set defsearch=duckduckgo
 " Mappings
 """"""""""""""""""""""""
 
-let mapleader = ","
-
 " Insert mode! Focus on first imput
 nmap i gi