Clean up SimpleGridData e2c2v field #408 (#432)

* Replace `e2c2v` table with `diamond` table

model/common/src/icon4py/model/common/grid/simple.py

@@ -97,26 +97,26 @@ class SimpleGridData:
             [1, 5, 2, 4],  # 4
             [1, 4, 5, 0],  # 5
             [2, 0, 3, 8],  # 6
-            [2, 3, 5, 0],  # 7
+            [2, 3, 0, 5],  # 7
             [2, 5, 1, 3],  # 8
             [3, 4, 0, 7],  # 9
             [3, 7, 4, 6],  # 10
-            [3, 6, 7, 5],  # 11
-            [4, 5, 8, 1],  # 12
-            [4, 8, 7, 5],  # 13
+            [3, 6, 5, 7],  # 11
+            [4, 5, 1, 8],  # 12
+            [4, 8, 5, 7],  # 13
             [4, 7, 3, 8],  # 14
-            [5, 3, 6, 2],  # 15
-            [6, 5, 3, 8],  # 16
-            [8, 5, 6, 4],  # 17
+            [5, 3, 2, 6],  # 15
+            [5, 6, 3, 8],  # 16
+            [5, 8, 4, 6],  # 17
             [6, 7, 3, 1],  # 18
             [6, 1, 7, 0],  # 19
             [6, 0, 1, 8],  # 20
-            [7, 8, 2, 4],  # 21
+            [7, 8, 4, 2],  # 21
             [7, 2, 8, 1],  # 22
-            [7, 1, 2, 6],  # 23
-            [8, 6, 0, 5],  # 24
+            [7, 1, 6, 2],  # 23
+            [8, 6, 5, 0],  # 24
             [8, 0, 6, 2],  # 25
-            [8, 2, 0, 6],  # 26
+            [8, 2, 7, 0],  # 26
         ]
     )
 
@@ -299,38 +299,6 @@ class SimpleGridData:
         ]
     )
 
-    diamond_table = np.asarray(
-        [
-            [0, 1, 4, 6],  # 0
-            [0, 4, 1, 3],
-            [0, 3, 4, 2],
-            [1, 2, 5, 7],  # 3
-            [1, 5, 2, 4],
-            [1, 4, 5, 0],
-            [2, 0, 3, 8],  # 6
-            [2, 3, 0, 5],
-            [2, 5, 1, 3],
-            [3, 4, 0, 7],  # 9
-            [3, 7, 4, 6],
-            [3, 6, 5, 7],
-            [4, 5, 1, 8],  # 12
-            [4, 8, 5, 7],
-            [4, 7, 3, 8],
-            [5, 3, 2, 6],  # 15
-            [5, 6, 3, 8],
-            [5, 8, 4, 6],
-            [6, 7, 3, 1],  # 18
-            [6, 1, 7, 0],
-            [6, 0, 1, 8],
-            [7, 8, 4, 2],  # 21
-            [7, 2, 8, 1],
-            [7, 1, 6, 2],
-            [8, 6, 5, 0],  # 24
-            [8, 0, 6, 2],
-            [8, 2, 7, 0],
-        ]
-    )
-
     c2e2cO_table = np.asarray(
         [
             [15, 4, 3, 0],
@@ -449,7 +417,7 @@ def num_edges(self) -> int:
 
     @property
     def diamond_table(self) -> int:
-        return SimpleGridData.diamond_table
+        return SimpleGridData.e2c2v_table
 
     @property
     def num_levels(self) -> int: