doc: Remove capi.button/capi.key from the official doc.

`awful.button` is always the one used and it's confusing.

docs/config.ld

@@ -118,10 +118,8 @@ file = {
     '../spawn.c',
     '../xkb.c',
     '../common/luaobject.c',
-    '../objects/button.c',
     '../objects/client.c',
     '../objects/drawable.c',
-    '../objects/key.c',
     '../objects/screen.c',
     '../objects/tag.c',
     '../objects/window.c',
@@ -155,6 +153,11 @@ file = {
         '../lib/naughty/list/init.lua',
         '../lib/naughty/widget/_default.lua',
 
+        -- Ignore components that provide no value to users and have confusing
+        -- names
+        '../objects/button.c',
+        '../objects/key.c',
+
         -- Deprecated classes for one years or more don't deserve entries
         -- in the index
         '../lib/awful/widget/graph.lua',

lib/awful/button.lua

@@ -35,7 +35,6 @@ local ignore_modifiers = { "Lock", "Mod2" }
 -- will return 2 button objects: one with CapsLock on, and the other one with
 -- CapsLock off.
 --
--- @see button
 -- @treturn table A table with one or several button objects.
 function button.new(mod, _button, press, release)
     local ret = {}

lib/awful/key.lua

@@ -103,7 +103,7 @@ end
 -- ignored by default by this function), creating a key binding with this
 -- function will return 2 key objects: one with CapsLock on, and another one
 -- with CapsLock off.
--- @see key.key
+--
 -- @tparam table mod A list of modifier keys.  Valid modifiers are: Any, Mod1,
 --   Mod2, Mod3, Mod4, Mod5, Shift, Lock and Control.
 -- @tparam string _key The key to trigger an event.
@@ -113,6 +113,7 @@ end
 -- for example {description="select next tag", group="tag"}.
 -- @treturn table A table with one or several key objects.
 -- @constructorfct awful.key
+
 function key.new(mod, _key, press, release, data)
     if type(release)=='table' then
         data=release