Use rm -rf to avoid warnings for files that have already been removed.

tutorials/compressibleLesInterFoam/depthCharge3D/Allclean

@@ -2,4 +2,4 @@
 
 foamCleanTutorials cases
 rm -rf processor*
-rm 0/pd.gz 0/alpha1.gz
+rm -rf 0/pd.gz 0/alpha1.gz

tutorials/gnemdFoam/Allclean

@@ -4,16 +4,13 @@
 . $WM_PROJECT_DIR/bin/tools/CleanFunctions
 
 cd constrictedChannel
-    rm -rf 0 > /dev/null 2>&1
+    rm -rf 0
-    rm Ar-Ar Ar-Ne Ne-Ne > /dev/null 2>&1
+    rm -rf Ar-Ar Ar-Ne Ne-Ne
-    rm constant/idList
+    rm -rf constant/idList
-
     cleanCase
 cd ..
 
 cd nanoNozzle
-    rm -rf processor[0-9] > /dev/null 2>&1
+    rm -rf processor[0-9]
-
     cleanCase
 cd ..
-

tutorials/mdEquilibrationFoam/Allclean

@@ -4,10 +4,8 @@
 . $WM_PROJECT_DIR/bin/tools/CleanFunctions
 
 cd periodicCube
-    rm -rf 0 > /dev/null 2>&1
+    rm -rf 0
-    rm Ar-Ar > /dev/null 2>&1
+    rm -rf Ar-Ar
-    rm constant/idList
+    rm -rf constant/idList
-
     cleanCase
 cd ..
-

tutorials/rhoCentralFoam/Allclean

@@ -24,7 +24,7 @@ do
 
     if [ "$case" = "biconic25-55Run35" ]
     then
-        rm $case/constant/polyMesh/boundary
+        rm -rf $case/constant/polyMesh/boundary
         wclean $case/datToFoam
     fi
 done