fix deskew regression

mantis/analysis/deskew.py

@@ -56,14 +56,13 @@ def _get_averaged_shape(deskewed_data_shape: tuple, average_window_width: int) -
 
 
 def _get_transform_matrix(
-    data_shape: tuple, ls_angle_deg: float, px_to_scan_ratio: float, keep_overhang: bool
+    ls_angle_deg: float, px_to_scan_ratio: float
 ):
     """
     Compute affine transformation matrix used to deskew data.
 
     Parameters
     ----------
-    data_shape : tuple
     ls_angle_deg : float
     px_to_scan_ratio : float
     keep_overhang : bool
@@ -73,23 +72,20 @@ def _get_transform_matrix(
     matrix : np.array
         Affine transformation matrix.
     """
-    Z, Y, X = data_shape
-
     ct = np.cos(ls_angle_deg * np.pi / 180)
-    Z_shift = 0
-    if not keep_overhang:
-        Z_shift = int(np.floor(Y * ct * px_to_scan_ratio))
 
     matrix = np.array(
         [
             [
                 -px_to_scan_ratio * ct,
                 0,
                 px_to_scan_ratio,
-                Z_shift,
+                0,
             ],
-            [-1, 0, 0, Y - 1],
-            [0, -1, 0, X - 1],
+            [-1, 0, 0, 0],
+            [0, -1, 0, 0],
+            [0, 0, 0, 1],
+
         ]
     )
 
@@ -192,7 +188,7 @@ def deskew_data(
     """
     # Prepare transforms
     matrix = _get_transform_matrix(
-        raw_data.shape, ls_angle_deg, px_to_scan_ratio, keep_overhang
+        ls_angle_deg, px_to_scan_ratio,
     )
 
     output_shape, _ = get_deskewed_data_shape(