chore: remove unused dev feature flag component (#539)

this is unused for now, if we ever need it we'll use either Grafana native feature flags, or something similar to how we control optional features (boolean flags in the config)

Author: polomani

src/components/configEditor.tsx

@@ -2,7 +2,6 @@ import React, { ChangeEvent, useState } from 'react';
 import { Icon, LegacyForms } from '@grafana/ui';
 import { DataSourcePluginOptionsEditorProps } from '@grafana/data';
 import { CogniteDataSourceOptions, CogniteSecureJsonData } from '../types';
-import { FeatureFlagsWarning, KonamiTracker } from './devFeatures';
 import '../css/common.css';
 
 const { SecretFormField, FormField, Switch } = LegacyForms;