bench: remove duplicate logic

PR-URL: stdlib-js#5160
Closes: stdlib-js#5143
Reviewed-by: Athan Reines <[email protected]>

Author: ekambains

lib/node_modules/@stdlib/stats/base/dists/gamma/mgf/benchmark/benchmark.js

@@ -76,11 +76,6 @@ bench( pkg+':factory', function benchmark( b ) {
 	alpha = 20.0;
 	beta = 15.0;
 	mymgf = mgf.factory( alpha, beta );
-	len = 100;
-	t = new Float64Array( len );
-	for ( i = 0; i < len; i++ ) {
-		t[ i ] = uniform( 0.0, beta );
-	}
 
 	len = 100;
 	t = new Float64Array( len );