Remove the c-style "have I been included before" check, because it actually was making things worse

cmdarg.sh

@@ -329,8 +329,6 @@ function cmdarg_purge
     CMDARG_GETOPTLIST="h"
 }
 
-if [[ "${_DEFINED_CMDARG}" == "" ]]; then
-    export _DEFINED_CMDARG=0
 # Holds the final map of configuration options
 declare -xA cmdarg_cfg
 # Maps (short arg) -> (long arg)
@@ -354,4 +352,3 @@ if [[ "${_DEFINED_CMDARG}" == "" ]]; then
 # Map of (short arg) -> type (string, array, hash)
 declare -xA CMDARG_TYPES
 CMDARG_GETOPTLIST="h"
-fi