Obsolete variable `controllerVersions` with unnecessary initialization code

[UncleSamSwiss]

It seems like controllerVersions is no longer needed. The only two places I found it, are:

• ioBroker.js-controller/packages/controller/src/main.ts

  Line 147 in 37c8b67

  const controllerVersions: Record<string, string> = {};

• ioBroker.js-controller/packages/controller/src/main.ts

  Lines 5451 to 5461 in 37c8b67

  	// get the current host versions
  	try {
  	const hostView = await objects!.getObjectViewAsync('system', 'host');
  	for (const row of hostView.rows) {
  	if (row.value?.common?.installedVersion) {
  	controllerVersions[row.id] = row.value.common.installedVersion;
  	}
  	}
  	} catch {
  	// ignore
  	}

The initialization can be removed, making start-up slightly faster.