Remove obsolete dep: fastddsgen #745

Job	Run time
fc_matrix (pixhawk) / build	7m 0s
fc_matrix (saluki-pi_bootloader) / build	4m 24s
fc_matrix (saluki-pi_amp) / build	9m 48s
fc_matrix (saluki-pi_default) / build	8m 3s
fc_matrix (saluki-v2_amp) / build	7m 58s
fc_matrix (saluki-v2_bootloader) / build	4m 27s
fc_matrix (saluki-pi_protected) / build	9m 25s
fc_matrix (saluki-v2_default) / build	10m 10s
fc_matrix (saluki-v2_kernel) / build	11m 3s
fc_matrix (saluki-v2_protected) / build	8m 44s
fc_matrix (saluki-v3_amp) / build	7m 59s
fc_matrix (saluki-v3_default) / build	8m 17s
build px4fwupdater	1m 45s
upload px4fwupdater to docker registry	1m 12s
upload px4fwupdater to UAE docker registry	1m 1s
upload builds to UAE artifactory	4m 18s
upload builds to artifactory	50s
	1h 46m 24s

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