Instead of full docs, only document the commands

Full documentation takes way too much space, and command names are a reasonable
compromise for discoverability.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

src/Kaleidoscope/HostOS-Focus.h

@@ -27,8 +27,4 @@ namespace KaleidoscopePlugins {
 };
 
 #define FOCUS_HOOK_HOSTOS \
-  FOCUS_HOOK(KaleidoscopePlugins::HostOS::Focus,                \
+  FOCUS_HOOK(KaleidoscopePlugins::HostOS::Focus, "hostos.type")
-             "hostos.type [TYPE]\n"                             \
-             "------------------\n"                             \
-             "Set the OS type to `TYPE`; or display the "       \
-             "type, when called without arguments.")