test: fix signature

Signed-off-by: Athan <[email protected]>

Author: kgryte

lib/node_modules/@stdlib/ndarray/flatten/test/test.js

@@ -219,13 +219,9 @@ tape( 'the function throws an error if provided an invalid `dtype` option', func
 			var opts = {
 				'dtype': value
 			};
-			flatten( zeros( [ 2 ] ), opts, scale );
+			flatten( zeros( [ 2 ] ), opts );
 		};
 	}
-
-	function scale( z ) {
-		return z * 10.0;
-	}
 });
 
 tape( 'by default, the function flattens all dimensions of a provided input ndarray in lexicographic order (row-major, contiguous)', function test( t ) {