chore: remove unrelated keyword

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

Author: kgryte

lib/node_modules/@stdlib/stats/base/ndarray/varianceyc/package.json

@@ -59,10 +59,7 @@
     "var",
     "dispersion",
     "spread",
-    "sample variance",
-    "unbiased",
-    "ndarray",
-    "welford"
+    "ndarray"
   ],
   "__stdlib__": {}
 }