remove: unused variables

Signed-off-by: Shabareesh Shetty <[email protected]>

Author: ShabiShett07

lib/node_modules/@stdlib/math/base/special/roundsd/benchmark/c/native/benchmark.c

@@ -93,8 +93,6 @@ static double benchmark( void ) {
 	double elapsed;
 	double t;
 	double v;
-	double n;
-	double b;
 	double y;
 	int i;