remove double override

Author: commjoen

Dockerfile.web

@@ -8,7 +8,6 @@ ARG CHALLENGE_THIRTY_HOST_VALUE="not_set"
 ARG challenge59_webhook_url="YUhSMGNITTZMeTlvYjI5cmN5NXpiR0ZqYXk1amIyMHZjMlZ5ZG1salpYTXZWREEwVkRRd1RraFlMMEl3T1VSQlRrb3lUamRMTDJNeWFqYzFSVEUzVjFrd2NFeE5SRXRvU0RsbGQzZzBhdz09"
 ENV CHALLENGE59_SLACK_WEBHOOK_URL=$challenge59_webhook_url
 ARG CHALLENGE_RANDO_KEY_CTF_TO_PROVIDE_TO_HOST="not_set"
-ARG CHALLENGE59_SLACK_WEBHOOK_URL="YUhSMGNITTZMeTlvYjI5cmN5NXpiR0ZqYXk1amIyMHZjMlZ5ZG1salpYTXZWREV5TXpRMU5qYzRPUzlDTVRJek5EVTJOemc1THpGaE1tSXpZelJrTldVMlpqZG5PR2c1YVRCcU1Xc3liRE50Tkc0MWJ6WndDZz09"
 #ONLY OVERRIDE THE ARGS BELOW WHEN YOU ARE SETTING UP A CTF!
 ARG CTF_KEY=TRwzkRJnHOTckssAeyJbysWgP!Qc2T
 ARG CHALLENGE_5_VALUE=if_you_see_this_please_use_k8s
@@ -17,7 +16,6 @@ ARG CHALLENGE_7_VALUE=if_you_see_this_please_use_K8S_and_Vault
 ARG CHALLENGE_9_VALUE=if_you_see_this_please_use_AWS_Setup
 ARG CHALLENGE_10_VALUE=if_you_see_this_please_use
 ARG CHALLENGE_11_VALUE=if_you_see_this_please_use
-ENV CHALLENGE59_SLACK_WEBHOOK_URL=$challenge59_webhook_url
 ENV APP_VERSION=$argBasedVersion
 ENV K8S_ENV=Heroku(Docker)
 ENV canarytokenURLs=$CANARY_URLS