Remove unnecessary xxSys dependencies, exposed by Lbcom!286

• [2018-10-24 00:21] Validation started with lhcb-tdr-test#332
• [2018-10-24 10:23] Validation started with lhcb-tdr-test#333
• [2018-10-25 00:17] Validation started with lhcb-lcg-dev4#693
• [2018-10-25 17:02] Validation started with lhcb-gaudi-merge#621
• [2018-10-26 00:19] Validation started with lhcb-head#2033
• [2018-10-26 00:21] Validation started with lhcb-lcg-dev4#694
• [2018-10-26 00:22] Validation started with lhcb-lcg-dev3#690
• [2018-10-26 00:23] Validation started with lhcb-tdr-test#336
• [2018-10-26 00:23] Validation started with lhcb-gaudi-head#2040
• [2018-10-26 00:24] Validation started with lhcb-sanitizers#45
• [2018-10-26 07:50] Validation started with lhcb-tdr-test#337
• [2018-10-26 10:07] Validation started with lhcb-lcg-dev4#695
• [2018-10-26 10:16] Validation started with lhcb-gaudi-merge#622

unmarked as a Work In Progress

merged

mentioned in commit 30ee6732

mentioned in commit 728535ce

mentioned in merge request !265 (merged)