Removed a duplicate entry for Avision AV210C2

Removed a duplicate entry for Avision AV210C2 and Regenerated the
description file.

backend/avision.c

@@ -238,13 +238,6 @@ static Avision_HWEntry Avision_Device_List [] =
     /* comment="sheetfed scanner" */
     /* status="complete" */
 
-    { NULL, NULL,
-      0x0638, 0x0A3A,
-      "Avision", "AV210C2",
-      AV_INT_BUTTON | AV_GRAY_MODES,0},
-    /* comment="sheetfed scanner" */
-    /* status="complete" */
-
     { NULL, NULL,
       0x0638, 0x0A23,
       "Avision", "AV220",

doc/descriptions/avision.desc

@@ -89,12 +89,6 @@
 :comment "sheetfed scanner"
 :status :complete
 
-:model "AV210C2"
-:interface "USB"
-:usbid "0x0638" "0x0a3a"
-:comment "sheetfed scanner"
-:status :complete
-
 :model "AV220"
 :interface "USB"
 :usbid "0x0638" "0x0a23"