Fix image validation

includes/settings/class-displayfeaturedimagegenesis-settings-validate.php

@@ -177,29 +177,6 @@ class Display_Featured_Image_Genesis_Settings_Validate extends Display_Featured_
 		return $message;
 	}
 
-	/**
-	 * check if file type is image. updated to use WP function.
-	 * @return bool
-	 * @since  1.2.2
-	 * @since  2.5.0
-	 */
-	protected function is_valid_img_ext( $file ) {
-		$valid = wp_check_filetype( $file );
-
-		return (bool) in_array( $valid['ext'], $this->allowed_file_types(), true );
-	}
-
-	/**
-	 * Define the array of allowed image/file types.
-	 * @return array
-	 * @since 2.5.0
-	 */
-	protected function allowed_file_types() {
-		$allowed = apply_filters( 'displayfeaturedimage_valid_img_types', array( 'jpg', 'jpeg', 'png', 'gif' ) );
-
-		return is_array( $allowed ) ? $allowed : explode( ',', $allowed );
-	}
-
 	/**
 	 * Returns a 1 or 0, for all truthy / falsy values.
 	 *