Remove stubs for reloadconfig.

- reloadconfig never worked properly. There were a number of circumstances
    under which it would crash awesome.

    - reloadconfig always leaked memory, because our cleanup process was never
    perfect. Making it perfect would be Hard.

    - Just exec-ing awesome over the top of itself is an OK solution. Maybe we
    should add a uicb_restart to do this so users don't have to think about
    uicb_exec.

awesomerc

@@ -283,12 +283,6 @@ keys
         key = "q"
         command = "quit"
     }
-    key
-    {
-        modkey = {"Mod4", "Control"}
-        key = "r"
-        command = "reloadconfig"
-    }
 
     key
     {

config.h

@@ -254,7 +254,5 @@ struct awesome_config
 
 void parse_config(const char *, awesome_config *);
 
-void uicb_reloadconfig(awesome_config *, const char *);
-
 #endif
 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99