fix: Remove mistakenly added import

Author: camdecoster

src/plots/plots.js

@@ -37,7 +37,6 @@ plots.fontAttrs = require('./font_attributes');
 plots.layoutAttributes = require('./layout_attributes');
 
 var commandModule = require('./command');
-const { server } = require('karma');
 plots.executeAPICommand = commandModule.executeAPICommand;
 plots.computeAPICommandBindings = commandModule.computeAPICommandBindings;
 plots.manageCommandObserver = commandModule.manageCommandObserver;