Remove recommendation to set ROCKET_CLI_COLORS to off

The value is now a boolean so setting it to off will cause an error

.env.template

@@ -116,12 +116,10 @@
 # LOG_TIMESTAMP_FORMAT="%Y-%m-%d %H:%M:%S.%3f"
 
 ## Logging to file
-## It's recommended to also set 'ROCKET_CLI_COLORS=off'
 # LOG_FILE=/path/to/log
 
 ## Logging to Syslog
 ## This requires extended logging
-## It's recommended to also set 'ROCKET_CLI_COLORS=off'
 # USE_SYSLOG=false
 
 ## Log level