catalyst-auto: drop unused variables

tools/catalyst-auto

@@ -87,21 +87,21 @@ update_symlinks() {
   # This is a skeleton function that you can override from the config file.
   # It will be called by pre_build and after completing the build of a set
   # to ensure the symlinks point to the latest built stages.
-  local foo=bar
+  :
 }
 
 pre_build() {
   # This is a skeleton function that you can override from the config file.
   # It will be executed before the build is started. You can use this to
   # update the checkout of the releng repo
-  local foo=bar
+  :
 }
 
 post_build() {
   # This is a skeleton function that you can override from the config file.
   # It will be executed after the build is successfully completed. You can
   # use this to rsync the builds to another box
-  local foo=bar
+  :
 }
 
 catalyst_var() {
@@ -111,7 +111,6 @@ catalyst_var() {
 }
 
 # Parse args
-params=${#}
 while [ ${#} -gt 0 ]
 do
   a=${1}