decomposeParDict: The 'delta' entry for geometric decomposition is no option and defaults to 0.001

When using 'simple' or 'hierarchical' decomposition it is useful to slightly rotate a
coordinate-aligned block-mesh to improve the processor boundaries by avoiding
irregular cell distribution at those boundaries.  The degree of slight rotation
is controlled by the 'delta' coefficient and a value of 0.001 is generally
suitable so to avoid unnecessary clutter in 'decomposeParDict' 'delta' now
defaults to this value.

tutorials/discreteMethods/dsmcFoam/freeSpacePeriodic/system/decomposeParDict

@@ -21,13 +21,11 @@ method          simple;
 simpleCoeffs
 {
     n               (1 2 2);
-    delta           0.001;
 }
 
 hierarchicalCoeffs
 {
     n               (1 1 1);
-    delta           0.001;
     order           xyz;
 }
 

tutorials/discreteMethods/dsmcFoam/freeSpaceStream/system/decomposeParDict

@@ -21,13 +21,11 @@ method          simple;
 simpleCoeffs
 {
     n               (1 2 2);
-    delta           0.001;
 }
 
 hierarchicalCoeffs
 {
     n               (1 1 1);
-    delta           0.001;
     order           xyz;
 }
 

tutorials/discreteMethods/dsmcFoam/supersonicCorner/system/decomposeParDict

@@ -21,13 +21,11 @@ method          simple;
 simpleCoeffs
 {
     n               (2 2 1);
-    delta           0.001;
 }
 
 hierarchicalCoeffs
 {
     n               (1 1 1);
-    delta           0.001;
     order           xyz;
 }
 

tutorials/discreteMethods/dsmcFoam/wedge15Ma5/system/decomposeParDict

@@ -21,13 +21,11 @@ method          simple;
 simpleCoeffs
 {
     n               (2 2 1);
-    delta           0.001;
 }
 
 hierarchicalCoeffs
 {
     n               (1 1 1);
-    delta           0.001;
     order           xyz;
 }
 

tutorials/discreteMethods/molecularDynamics/mdEquilibrationFoam/periodicCubeArgon/system/decomposeParDict

@@ -22,13 +22,11 @@ method              simple;
 simpleCoeffs
 {
     n               (2 1 1);
-    delta           0.001;
 }
 
 hierarchicalCoeffs
 {
     n               (1 1 1);
-    delta           0.001;
     order           xyz;
 }
 

tutorials/discreteMethods/molecularDynamics/mdEquilibrationFoam/periodicCubeWater/system/decomposeParDict

@@ -22,13 +22,11 @@ method              simple;
 simpleCoeffs
 {
     n               (2 2 1);
-    delta           0.001;
 }
 
 hierarchicalCoeffs
 {
     n               (1 1 1);
-    delta           0.001;
     order           xyz;
 }
 

tutorials/discreteMethods/molecularDynamics/mdFoam/nanoNozzle/system/decomposeParDict

@@ -22,13 +22,11 @@ method              scotch;
 simpleCoeffs
 {
     n               (2 2 1);
-    delta           0.001;
 }
 
 hierarchicalCoeffs
 {
     n               (1 1 1);
-    delta           0.001;
     order           xyz;
 }