Removed unhelpful debug mode

The return value of the 'wd' command is always '0' by default
so it cannot be processed by another program.
The return value is given as degguage mode associated with an exit
which does not allow it to be used with '$?'.

plugins/wd/wd.sh

@@ -90,7 +90,6 @@ Commands:
     clean                Remove points warping to nonexistent directories (will prompt unless --force is used)
 
     -v | --version  Print version
-    -d | --debug    Exit after execution with exit codes (for testing)
     -c | --config   Specify config file (default ~/.warprc)
     -q | --quiet    Suppress all output
     -f | --force    Allows overwriting without warning (for add & clean)
@@ -436,7 +435,6 @@ zparseopts -D -E \
     c:=wd_alt_config -config:=wd_alt_config \
     q=wd_quiet_mode -quiet=wd_quiet_mode \
     v=wd_print_version -version=wd_print_version \
-    d=wd_debug_mode -debug=wd_debug_mode \
     f=wd_force_mode -force=wd_force_mode
 
 if [[ ! -z $wd_print_version ]]
@@ -583,9 +581,4 @@ unset args
 unset points
 unset val &> /dev/null # fixes issue #1
 
-if [[ -n $wd_debug_mode ]]
-then
-    exit $WD_EXIT_CODE
-else
-    unset wd_debug_mode
-fi
+return $WD_EXIT_CODE