remove old ROOT and FairMQ tags from o2-epn and o2-dataflow defaults

Author: ehellbar

defaults-o2-dataflow.sh

@@ -72,10 +72,6 @@ overrides:
       - libInfoLogger
       - librdkafka   # this one added
       - grpc   # this one added
-  FairMQ:
-    tag: "v1.9.2"
-  ROOT:
-    tag: "v6-32-06-alice10"
 ---
 # This file is included in any build recipe and it's only used to set
 # environment variables. Which file to actually include can be defined by the

defaults-o2-epn.sh

@@ -48,10 +48,6 @@ overrides:
       - O2
       - fmt
       - ucx   # this one added
-  FairMQ:
-    tag: "v1.9.2"
-  ROOT:
-    tag: "v6-32-06-alice10"
 ---
 # This file is included in any build recipe and it's only used to set
 # environment variables. Which file to actually include can be defined by the