Revert "fix nl tap config"

This reverts commit 1530747.

I, Nitish Bharambe <[email protected]>, hereby add my Signed-off-by to this commit: 96ade36

Signed-off-by: Nitish Bharambe <[email protected]>

Author: nitbharambe

src/power_grid_model_io/config/excel/vision_nl.yaml

@@ -823,11 +823,11 @@ grid:
         power_grid_model_io.functions.phase_to_phase.get_clock_13:
           conn_str: Schakeling
       tap_side: Trapzijde u
-      tap_pos: Trapstand u
-      tap_min: Trapmin u
-      tap_max: Trapmax u
-      tap_nom: Trapnom u
-      tap_size: Trapgrootte u
+      tap_pos: Trapstand i
+      tap_min: Trapmin i
+      tap_max: Trapmax i
+      tap_nom: Trapnom i
+      tap_size: Trapgrootte i
       r_grounding_1: Ra1
       x_grounding_1: Xa1
       r_grounding_2: Ra2
@@ -920,14 +920,6 @@ substitutions:
   Trapzijde:
     1: 0
     2: 1
-  Trapzijde u:
-    1: 0
-    2: 1
-    3: 2
-  Trapzijde i:
-    1: 0
-    2: 1
-    3: 2
   Synchrone generatoren.Q:
     terugleveren: -1
     leveren: 1