Move delete logic to the License class

Author: bastianallgeier

config/areas/system/dialogs.php

@@ -74,14 +74,7 @@
 			];
 		},
 		'submit' => function () {
-			$kirby   = App::instance();
-			$license = $kirby->system()->license();
-			$file    = $license->root();
-
-			if (F::exists($file) === true) {
-				return F::remove($file);
-			}
-
+			App::instance()->system()->license()->delete();
 			return true;
 		}
 	],

src/Cms/License.php

@@ -101,6 +101,14 @@ public function date(
 		return $this->date !== null ? Str::date(strtotime($this->date), $format, $handler) : null;
 	}
 
+	/**
+	 * Deletes the license file if it exists.
+	 */
+	public function delete(): bool
+	{
+		return F::remove($this->root());
+	}
+
 	/**
 	 * Returns the activation domain if available
 	 */