ENH: Tutorial update

tutorials/incompressible/icoFoam/cavity/0/U

@@ -22,17 +22,8 @@ boundaryField
 {
     movingWall
     {
-        type            uniformFixedValue;
-        uniformValue    csvFile;
-        csvFileCoeffs
-        {
-            nHeaderLine     1;
-            refColumn       0;
-            componentColumns (1 2 3);
-            mergeSeparators no;
-            fileName        "$FOAM_CASE/csvData";
-            separator       " ";
-        }
+        type            fixedValue;
+        value           uniform (1 0 0);
     }
 
     fixedWalls