This is probably the smallest and shortest plugin you'll ever see.
I don't even expect it to be approved.
Anyway I had this problem were CS:GO would just not follow my cvars and spawn bots randomly causing the player report to be screwed up completely.
If you don't ever want bots in your game then this is the plugin you need.
There is no cvar to set, nothing to be done other than putting the plugin in the right directory.
This plugin kicks all the bots that try to join the server.
- put nobots_enforcer.smx into your sourcemod/plugins/ directory
- optionally put nobots_enforcer.sp into sourcemod/scripting (it's the source code if you don't know)