refactor: remove unreachable branch

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

Author: kgryte

lib/node_modules/@stdlib/stats/base/variancetk/lib/accessors.js

@@ -59,9 +59,6 @@ function variancetk( N, correction, x, strideX, offsetX ) {
 	get = x.accessors[ 0 ];
 
 	n = N - correction;
-	if ( N === 1 || strideX === 0 ) {
-		return 0.0;
-	}
 	ix = offsetX;
 	S2 = 0.0;
 	S = 0.0;