Remove duplicate `i32x2` type definition

api/lovr/graphics/DataType.lua

@@ -83,10 +83,6 @@ return {
       name = 'i32x2',
       description = 'Two 32-bit signed integers.'
     },
-    {
-      name = 'i32x2',
-      description = 'Two 32-bit signed integers.'
-    },
     {
       name = 'i32x3',
       description = 'Three 32-bit signed integers.'