types: remove default type

types: remove default type

The default type is copied over for each new key type to build on.
Further, it can be modified from within the xkb_types section itself,
with statements such as "type.modifiers = Lock" which affect all
subsequent type definitions.

The default type is (well, by default) just the simplest one level type
possible, with name "default". When no types are defined at all, it is
copied over to the keymap as the single type.

xkeyboard-config never changes the default type. There is also no sane
use case for doing so; changing any thing there doesn't make sense. So
instead of doing all the hard work of maintaining and copying this type,
which is practically never used, just remove it and initialize new types
appropriately.

Signed-off-by: Ran Benita <ran234@gmail.com>