Remove obsolete `$_COMMAND_ARGV` variable.

hosts

@@ -1577,7 +1577,7 @@ Description:
   Search entries for <search string>.
 HEREDOC
 search() {
-  if _blank "${_COMMAND_ARGV[1]:-}"
+  if [[ -z "${1:-}" ]]
   then
     help "search"
     exit 1
@@ -1690,16 +1690,8 @@ _RAW_OPTIONS="${*:-}"
 
 # Parse Options ###############################################################
 
-# Initialize $_COMMAND_ARGV array
-#
-# This array contains all of the arguments that get passed along to each
-# command. This is essentially the same as the program arguments, minus those
-# that have been filtered out in the program option parsing loop. This array
-# is initialized with $0, which is the program's name.
-_COMMAND_ARGV=("${0}")
-# Initialize $_CMD and `$_USE_DEBUG`, which can continue to be blank depending
-# on what the program needs.
 _CMD=""
+_COMMAND_PARAMETERS=()
 _USE_DEBUG=0
 _AUTO_SUDO=0
 
@@ -1746,39 +1738,23 @@ do
       _AUTO_SUDO=1
       ;;
     *)
-      # The first non-option argument is assumed to be the command name.
-      # All subsequent arguments are added to $_COMMAND_ARGV.
       if [[ -z "${_CMD:-}"                          ]] &&
          [[ "${__opt:-}" =~ ${_SUBCOMMANDS_PATTERN} ]]
       then
         _CMD="${__opt}"
       else
-        _COMMAND_ARGV+=("${__opt}")
+        _COMMAND_PARAMETERS+=("${__opt}")
       fi
       ;;
   esac
 done
 
-# Set $_COMMAND_PARAMETERS to $_COMMAND_ARGV, minus the initial element, $0. This
-# provides an array that is equivalent to $* and $@ within each command
-# function, though the array is zero-indexed, which could lead to confusion.
-#
-# Use `unset` to remove the first element rather than slicing (e.g.,
-# `_COMMAND_PARAMETERS=("${_COMMAND_ARGV[@]:1}")`) because under bash 3.2 the
-# resulting slice is treated as a quoted string and doesn't easily get coaxed
-# into a new array.
-_COMMAND_PARAMETERS=("${_COMMAND_ARGV[@]}")
-unset "_COMMAND_PARAMETERS[0]"
-
 _debug printf \
   "\${_CMD}: %s\\n" \
   "${_CMD}"
 _debug printf \
   "\${_RAW_OPTIONS} (one per line):\\n%s\\n" \
   "${_RAW_OPTIONS}"
-_debug printf \
-  "\${_COMMAND_ARGV[*]}: %s\\n" \
-  "${_COMMAND_ARGV[*]}"
 _debug printf \
   "\${_COMMAND_PARAMETERS[*]:-}: %s\\n" \
   "${_COMMAND_PARAMETERS[*]:-}"