diff --git a/day_17/part_1.php b/day_17/part_1.php
index 2afc2b9..d081e98 100644
--- a/day_17/part_1.php
+++ b/day_17/part_1.php
@@ -9,7 +9,6 @@ $target = ['x_min' => $x_min, 'x_max' => $x_max, 'y_min' => $y_min, 'y_max' => $
 
 function increment(&$x, &$y, &$x_velocity, &$y_velocity)
 {
-    $current_x = $x;
     $x += $x_velocity;
     $y += $y_velocity;
     if ($x_velocity > 0) $x_velocity -= 1;
@@ -26,11 +25,6 @@ function check($x, $y, $target)
         $y <= $target['y_max'];
 }
 
-$x = 0;
-$y = 0;
-$x_velocity = 6;
-$y_velocity = 9;
-
 $max = 0;
 for ($i = 1; $i < abs($target['x_min']); $i++) {
     $tmp_max = 0;
diff --git a/day_17/part_2.php b/day_17/part_2.php
index 8c7b5f4..756d06f 100644
--- a/day_17/part_2.php
+++ b/day_17/part_2.php
@@ -9,7 +9,6 @@ $target = ['x_min' => $x_min, 'x_max' => $x_max, 'y_min' => $y_min, 'y_max' => $
 
 function increment(&$x, &$y, &$x_velocity, &$y_velocity)
 {
-    $current_x = $x;
     $x += $x_velocity;
     $y += $y_velocity;
     if ($x_velocity > 0) $x_velocity -= 1;
@@ -26,11 +25,6 @@ function check($x, $y, $target)
         $y <= $target['y_max'];
 }
 
-$x = 0;
-$y = 0;
-$x_velocity = 6;
-$y_velocity = 9;
-
 $possibilities = [];
 for ($i = 0; $i <= abs($target['x_max']); $i++) {
     for ($j = -abs($target['y_min']); $j <= abs($target['y_min']); $j++) {