style: remove doubled empty lines

Author: Alexandre Gérault

src/Illuminate/Config/Repository.php

@@ -180,7 +180,6 @@ public function offsetUnset($key): void
         $this->set($key, null);
     }
 
-
     /**
      * Get the specified configuration value typed as a string.
      * If the value isn't a string it should throw an exception.
@@ -221,7 +220,6 @@ public function array(string $key): array
         return $value;
     }
 
-
     /**
      * Get the specified configuration value typed as a boolean.
      * If the value isn't a boolean it should throw an exception.
@@ -262,7 +260,6 @@ public function integer(string $key): int
         return $value;
     }
 
-
     /**
      * Get the specified configuration value typed as a float.
      * If the value isn't a float it should throw an exception.