lttng-babeltrace: remove patch applied upstream

lttng-babeltrace: remove patch applied upstream

In commit 5b0dac7ef5d8106ec77d128c53f480fd8721c05c, when bumping to
lttng-babeltrace, one patch was kept while it had been applied in the
upstream babeltrace project, causing a build failure.

The patch 0003-fix-uuid-support-detection-on-static-build.patch has been
applied upstream as 2741f55be80ae8af169ae795ea28d2a39c18fa60 in the
master branch, and as d94e7873e9080e820e7742e468736b1317a88de1 in the
maintenance branch that was used to tag 1.5.0.

Fixes:

  http://autobuild.buildroot.net/results/585f960eb81b0e15858aadc4aca516af23012b61/
  (and about a hundred of similar build failures)

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>