trappy: remove double check for unique word
trappy: remove double check for unique word

Its not necessary to check for unique word twice. Reusing the 'class detection'
path for this purpose is sufficient. This improve performance by 3-6% of the
parsing stage.

Change-Id: Iff8ebd0086d2ccc10bec14e3d40a63f3c04aaf1a
Signed-off-by: Joel Fernandes <89f39a38232ac523c7644e47b6ca6563177e40b4@google.com>
Reviewed-by: KP Singh <d2841bc036e0f1e3090bf6691da4b34cb2d724be@google.com>

bjackman/trappy,bjackman/trappy,ARM-software/trappy,ARM-software/trappy,ARM-software/trappy,bjackman/trappy,bjackman/trappy,ARM-software/trappy