Some more minor fixes, make "strict" happy

Signed-off-by: Uli Schlachter <psychon@znc.in>

lib/awful/tooltip.lua.in

@@ -5,7 +5,6 @@
 -------------------------------------------------------------------------
 
 local mouse = mouse
-local widget = widget
 local wibox = wibox
 local screen = screen
 local timer = timer

lib/awful/widget/progressbar.lua.in

@@ -8,6 +8,7 @@ local setmetatable = setmetatable
 local ipairs = ipairs
 local math = math
 local base = require("wibox.widget.base")
+local color = require("gears.color")
 
 --- A progressbar widget.
 module("awful.widget.progressbar")

lib/awful/widget/taglist.lua.in

@@ -5,8 +5,7 @@
 ---------------------------------------------------------------------------
 
 -- Grab environment we need
-local capi = { widget = widget,
-               screen = screen,
+local capi = { screen = screen,
                oocairo = oocairo,
                client = client }
 local type = type