Remove context from detections.tags for a number of detections

detections/endpoint/detect_suspicious_processnames_using_pretrained_model_in_dsdl.yml

@@ -42,9 +42,6 @@ tags:
   - Suspicious Command-Line Executions
   asset_type: Endpoint
   confidence: 90
-  context:
-  - Source:Endpoint
-  - Stage:Execution
   impact: 50
   message: The process $process$ is running from an unusual place by $user$ on $dest$
     with a processname that appears to be randomly generated.

detections/endpoint/windows_file_share_discovery_with_powerview.yml

@@ -49,9 +49,6 @@ tags:
   - Active Directory Discovery
   asset_type: Endpoint
   confidence: 80
-  context:
-  - Source:Endpoint
-  - Stage:Privilege Escalation
   impact: 60
   message: Invoke-ShareFinder commandlet was executed on $Computer$
   mitre_attack_id:

detections/endpoint/windows_screen_capture_via_powershell.yml

@@ -45,9 +45,6 @@ tags:
   - Winter Vivern
   asset_type: Endpoint
   confidence: 70
-  context:
-  - Source:Endpoint
-  - Stage:Collection
   impact: 70
   message: A PowerShell script was identified possibly performing screen captures
     on $Computer$.