Change return types

src/Drivers/Abstract/AbstractFont.php

@@ -68,7 +68,7 @@ abstract class AbstractFont implements FontInterface
         return $this;
     }
 
-    public function getColor(): ?ColorInterface
+    public function getColor(): ColorInterface
     {
         return $this->handleInput($this->color);
     }

src/Interfaces/FontInterface.php

@@ -8,7 +8,7 @@ use Intervention\Image\Interfaces\ColorInterface;
 interface FontInterface
 {
     public function color($color): self;
-    public function getColor(): ?ColorInterface;
+    public function getColor(): ColorInterface;
     public function size(float $size): self;
     public function getSize(): float;
     public function angle(float $angle): self;

src/Interfaces/ImageInterface.php

@@ -3,7 +3,6 @@
 namespace Intervention\Image\Interfaces;
 
 use Countable;
-use Intervention\Image\Collection;
 use Intervention\Image\EncodedImage;
 use Traversable;