remove old dxes figures

meanas/fdmath/__init__.py

@@ -526,55 +526,6 @@ two of its nearest neighbors are E fore-vectors, labeled `[E]` in the figure.
 
 TODO: explain dxes
 
-    [figure: 3D base and derived grids]
-              _____________________________                  _____________________________
-     z y     /:          /:      /:      /|          z y          /:        /:      /:
-     |/_x   / :         / :     / :     / |          |/_x        / :       / :     / :
-           /  :        /  :    /  :    /  |                     /  :      /  :    /  :
-          /___________________________/   | dz[1]        ________________________/____
-         /    :      /    :  /    :  /|   |                   /:   :    /    :  /:   : dz[1]
-        /:    :     /     : /     : / |   |                  / :   :   /     : / :   :
-       / :    :..../......:/......:/..|...|                 / .:...:../......:/..:...:.....
-      /___________/_______/_______/   |  /|          ______/_________/_______/___:   :
-      |  :  / :   |       |       |   | / |                |   :   : |       |   :   :
-      |  : /  :   |       |       |   |/  |                |   :   : |       |   :   :
-      |  :/   :   |       |       |   |   | dz[0]          |   :   : |       |   :   : dz[0]
-      |  /    :   |       |       |  /|   |                |   :   : |       |   :   :
-      | /:    :...|.......|.......|./ |...|                | ..:...:.|.......|...:...:.....
-      |/ :   /    |      /|      /|/  |  /                 |   :  /  |      /|   :  /
-      |___________|_______|_______|   | /  dy[1]     ______|_________|_______|___: / dy[1]
-      |  : /      |    /  |    /  |   |/                   |   :/    |    /  |   :/
-      |  :/.......|.../...|.../...|...|                  ..|...:.....|.../...|...:...
-      |  /        |  /    |  /    |  /                     |  /      |  /    |  / dy[0]
-      | /         | /     | /     | /  dy[0]               | /       | /     | /
-      |/          |/      |/      |/                       |/        |/      |/
-      |___________|_______|_______|                  ______|_________|_______|___
-          dx[0]     dx[1]   dx[2]                            dx'[0]   dx'[1]  dx'[2]
-
-                Base grid                         Shifted one half-cell right (e.g. for 1D
-                                                  forward x derivative of all components).
-       z y         : /        : /     :dz'[1]        Some lines are omitted for clarity.
-       |/_x        :/         :/      :/
-            .......:..........:.......:...
-               |  /:      |  /:   |  /:
-               | / :      | / :   | / :
-               |/  :      |/  :   |/  :dz'[0]
-        ______________________________
-              /|   :/    /|   :/ /|   :/dy'[1]
-             /.|...:..../.|...:./.|...:....
-               |  /:      |  /:   |  /:
-               | / :      | / :   | /dy'[0]
-               |/  :      |/  :   |/  :
-        _______________________________
-              /|         /|      /|
-             / |        / |     / |
-               |          |       |
-                  dx'[0]    dx'[1]  dx'[2]
-
-      All three dimensions shifted by one half-
-      cell. This is quite hard to visualize
-      (and probably not entirely to scale); see
-      later figures for a better representation.
 
 
 """