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

wmake/scripts/paraviewFunctions

@@ -119,7 +119,7 @@ have_pvplugin_support()
     warn="==> skip paraview-plugin"
 
     # Trivial check
-    command -v cmake > /dev/null 2>&1 || {
+    command -v cmake >/dev/null || {
         echo "$warn (no cmake)"
         return 1
     }