Merge branch 'rm-const-in-extemconf' into '7.6'

Remove constant in ext_emconf.php.

See merge request riconet/typo3/extensions/rico_talentstorm!12

ext_emconf.php

@@ -8,7 +8,7 @@
  * (c) 2019 Hees riconet GmbH
  */
 
-$EM_CONF[\Riconet\RicoTalentstorm\Constants::EXTENSION_KEY] = [
+$EM_CONF[$_EXTKEY] = [
     'title' => 'TYPO3 Talentstorm integration',
     'description' => 'This extension adds a plugin, to list jobs from talentstorm.',
     'version' => '1.0.1',