[INTERNAL] core.FocusHandler: Clean up variable declarations
[INTERNAL] core.FocusHandler: Clean up variable declarations

Reverts "manual hoisting" done in this change: I27630a14006374fa3a824d0985388910b29b858f
Commit: 9a772afef227b16305e239a24f77a39160e1a78a

JIRA: CPOUI5FRAMEWORK-394
Change-Id: Id38026b1aab146429e08dcfc20c66cbbddb0a2a6

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5