Apply suggestions from code review

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

Author: kgryte

lib/node_modules/@stdlib/ml/base/loss/float64/log-gradient/README.md

@@ -219,11 +219,6 @@ int main( void ) {
 
 [log-loss-gradient]: https://en.wikipedia.org/wiki/Cross-entropy#Relation_to_linear_regression
 
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