fix(nemesis_data): remove data generated by other unittests

seem like some data is introduced by other unittest which are
testing nemesis, and shouldn't be included

Author: fruch

data_dir/nemesis.yml

@@ -18,7 +18,6 @@
   - run_with_gemini = False
   - limited = True
   - topology_changes = True
-- disrupt_add_remove_dc: []
 - disrupt_add_remove_mv:
   - disruptive = True
   - schema_changes = True
@@ -390,7 +389,6 @@
   - schema_changes = True
   - free_tier_set = True
   - supports_high_disk_utilization = True
-  - disabled = True
 - disrupt_toggle_table_ics:
   - kubernetes = True
   - schema_changes = True

data_dir/nemesis_classes.yml

@@ -1,6 +1,5 @@
 - AbortRepairMonkey
 - AddDropColumnMonkey
-- AddRemoveDCMonkey
 - AddRemoveDcNemesis
 - AddRemoveMvNemesis
 - AddRemoveRackNemesis