Removed a DAST CLI option that is not mandatory

One of the following must be set:
DAST_WEBSITE
DAST_API_SPECIFICATION

lib/gitlab/ci/templates/Security/DAST.gitlab-ci.yml

 # Read more about this feature here: https://docs.gitlab.com/ee/user/application_security/dast/
 
 # Configure the scanning tool through the environment variables.
-# List of the variables: https://gitlab.com/gitlab-org/security-products/dast#settings
+# List of the variables: https://docs.gitlab.com/ee/user/application_security/dast/#available-variables
 # How to set: https://docs.gitlab.com/ee/ci/yaml/#variables
 
 stages:
@@ -19,26 +19,10 @@ dast:
     name: "registry.gitlab.com/gitlab-org/security-products/dast:$DAST_VERSION"
   variables:
     GIT_STRATEGY: none
-  # URL to scan:
-  # DAST_WEBSITE: https://example.com/
-  #
-  # Time limit for target availability (scan is attempted even when timeout):
-  # DAST_TARGET_AVAILABILITY_TIMEOUT: 60
-  #
-  # Set these variables to scan with an authenticated user:
-  # DAST_AUTH_URL: https://example.com/sign-in
-  # DAST_USERNAME: john.doe@example.com
-  # DAST_PASSWORD: john-doe-password
-  # DAST_USERNAME_FIELD: session[user] # the name of username field at the sign-in HTML form
-  # DAST_PASSWORD_FIELD: session[password] # the name of password field at the sign-in HTML form
-  # DAST_AUTH_EXCLUDE_URLS: http://example.com/sign-out,http://example.com/sign-out-2 # optional: URLs to skip during the authenticated scan; comma-separated, no spaces in between
-  #
-  # Perform ZAP Full Scan, which includes both passive and active scanning:
-  # DAST_FULL_SCAN_ENABLED: "true"
   allow_failure: true
   script:
     - export DAST_WEBSITE=${DAST_WEBSITE:-$(cat environment_url.txt)}
-    - /analyze -t $DAST_WEBSITE
+    - /analyze
   artifacts:
     reports:
       dast: gl-dast-report.json