docs: update list of contributors

PR-URL: #3346

Co-authored-by: Philipp Burckhardt <pburckhardt@outlook.com>
Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>
Signed-off-by: stdlib-bot <82920195+stdlib-bot@users.noreply.github.com>

Author: stdlib-bot

CONTRIBUTORS

@@ -68,7 +68,6 @@ Ognjen Jevremović <ognjenjevremovic@users.noreply.github.com>
 Oneday12323 <107678750+Oneday12323@users.noreply.github.com>
 Ori Miles <97595296+orimiles5@users.noreply.github.com>
 Philipp Burckhardt <pburckhardt@outlook.com>
-Planeshifter <1913638+Planeshifter@users.noreply.github.com>
 Prajwal Kulkarni <prajwalkulkarni76@gmail.com>
 Pranav Goswami <goswami.4@iitj.ac.in>
 Praneki <97080887+PraneGIT@users.noreply.github.com>