docs: update copy

Signed-off-by: Athan <kgryte@gmail.com>

Author: kgryte

lib/node_modules/@stdlib/blas/ext/base/ndarray/gsumkbn/docs/repl.txt

@@ -3,9 +3,7 @@
     Computes the sum of all elements in a one-dimensional ndarray using an
     improved Kahan–Babuška algorithm.
 
-    If provided a real-valued empty ndarray, the function returns `0.0`.
-
-    If provided a complex-valued empty ndarray, the function returns `0+0i`.
+    If provided an empty ndarray, the function returns `0.0`.
 
     Parameters
     ----------
@@ -14,7 +12,7 @@
 
     Returns
     -------
-    out: number|Complex
+    out: number
         Sum.
 
     Examples