removes outdated pic

Author: benironside

docs/cloud-native-security/environment-variable-capture.asciidoc

@@ -28,9 +28,6 @@ To set up environment variable capture for an {agent} policy:
 . Enter the names of env vars you want to capture, separated by commas. For example: `PATH,USER`
 . Click *Save*.
 
-[role="screenshot"]
-image::images/env-var-capture.png[The "linux.advanced.capture_env_vars" advanced agent policy setting]
-
 [[find-cap-env-vars]]
 [discrete]
 == Find captured environment variables

docs/cloud-native-security/images/env-var-capture.png

@@ -22,9 +22,6 @@ To set up environment variable capture for an {agent} policy:
 . Enter the names of env vars you want to capture, separated by commas. For example: `PATH,USER`
 . Click **Save**.
 
-[role="screenshot"]
-image::images/environment-variable-capture/-cloud-native-security-env-var-capture.png[The "linux.advanced.capture_env_vars" advanced agent policy setting]
-
 [discrete]
 [[find-cap-env-vars]]
 == Find captured environment variables