fix: remove redundant code in accessor array functions of blas/ext/base/*

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---

Author: aayush0325

lib/node_modules/@stdlib/blas/ext/base/gsumkbn/lib/accessors.js

@@ -64,10 +64,6 @@ function gsumkbn( N, x, strideX, offsetX ) {
 	var c;
 	var i;
 
-	if ( N <= 0 ) {
-		return 0.0;
-	}
-
 	// Cache reference to array data:
 	xbuf = x.data;
 

lib/node_modules/@stdlib/blas/ext/base/gsumpw/lib/accessors.js

@@ -77,10 +77,6 @@ function gsumpw( N, x, strideX, offsetX ) {
 	var s;
 	var i;
 
-	if ( N <= 0 ) {
-		return 0.0;
-	}
-
 	// Cache reference to array data:
 	xbuf = x.data;