STYLE: remove unnecessary stdout, stderr /dev/null redirects

- no stderr redirect needed:
    * 'command -v'

- no stdout/stderr redirect needed:
    * 'rm -f'

STYLE: consistent spacing after redirects

src/functionObjects/graphics/runTimePostProcessing/Allwclean

@@ -6,7 +6,7 @@ cd ${0%/*} || exit 1                                # Run from this directory
 # This cleanup handles both cmake runTimePostProcessing and the dummy version
 
 # Cleanup library files with .so version endings
-rm -f $FOAM_LIBBIN/librunTimePostProcessing* 2>/dev/null
+rm -f $FOAM_LIBBIN/librunTimePostProcessing*
 
 # Cleanup generated files - remove entire top-level
 removeObjectDir "$PWD"

src/functionObjects/graphics/runTimePostProcessing/Allwmake

@@ -27,7 +27,7 @@ then
     depend=ignore
 elif [ -n "$depend" ]
 then
-    if command -v cmake > /dev/null 2>&1
+    if command -v cmake >/dev/null
     then
         cmakeVersioned "$depend" $PWD || {
             echo