Remove packages list from LbcomSys/CMakeLists.txt

Packages list was needed for SVN, no longer necessary with Git

• [2018-10-23 00:16] Validation started with lhcb-lcg-dev4#691
• [2018-10-24 00:22] Validation started with lhcb-lcg-dev4#692
• [2018-10-25 00:10] Validation started with lhcb-lcg-dev4#693
• [2018-10-25 16:51] Validation started with lhcb-gaudi-merge#621
• [2018-10-26 00:12] Validation started with lhcb-head#2033
• [2018-10-26 00:15] Validation started with lhcb-lcg-dev4#694
• [2018-10-26 00:15] Validation started with lhcb-sanitizers#45
• [2018-10-26 00:16] Validation started with lhcb-lcg-dev3#690
• [2018-10-26 00:16] Validation started with lhcb-tdr-test#336
• [2018-10-26 00:16] Validation started with lhcb-gaudi-head#2040
• [2018-10-26 07:42] Validation started with lhcb-tdr-test#337
• [2018-10-26 09:59] Validation started with lhcb-lcg-dev4#695
• [2018-10-26 10:09] Validation started with lhcb-gaudi-merge#622
• [2018-10-26 14:52] Validation started with lhcb-lcg-dev4#696
• [2018-10-26 14:55] Validation started with lhcb-tdr-test#338

mentioned in merge request DaVinci!264 (merged)

mentioned in merge request MooreOnline!61 (merged)

unmarked as a Work In Progress

added 1 commit

• 8918f4c8 - Put back gaudi_subdir, needed by test framework

Compare with previous version

mentioned in merge request Vetra!25 (merged)

mentioned in merge request Alignment!79 (merged)

mentioned in commit DaVinci@30ee6732

merged

mentioned in commit 6fe2e489

mentioned in commit 5c51dc45

mentioned in merge request !287 (merged)

mentioned in commit DaVinci@728535ce

mentioned in commit e3a1f8bf

mentioned in merge request !288 (merged)

mentioned in commit 419b2ae7

mentioned in merge request !289 (merged)