refactor: only import specific method

Author: kgryte

lib/node_modules/@stdlib/ndarray/iter/indices/lib/main.js

@@ -29,7 +29,7 @@ var hasOwnProp = require( '@stdlib/assert/has-own-property' );
 var iteratorSymbol = require( '@stdlib/symbol/iterator' );
 var zeros = require( '@stdlib/array/base/zeros' );
 var numel = require( '@stdlib/ndarray/base/numel' );
-var nextCartesianIndex = require( '@stdlib/ndarray/base/next-cartesian-index' );
+var nextCartesianIndex = require( '@stdlib/ndarray/base/next-cartesian-index' ).assign;
 var format = require( '@stdlib/string/format' );
 
 
@@ -148,7 +148,7 @@ function nditerIndices( shape ) {
 			};
 		}
 		if ( i > 0 ) {
-			idx = nextCartesianIndex.assign( shape, opts.order, idx, dim, idx );
+			idx = nextCartesianIndex( shape, opts.order, idx, dim, idx );
 		}
 		// Return the next set of indices:
 		return {