Remove unneeded opentelemetrybot from script (#1852)

Author: trask

.github/scripts/generate-release-contributors.sh

@@ -85,8 +85,6 @@ echo $contributors1 $contributors2 \
   | sort -uf \
   | grep -v linux-foundation-easycla \
   | grep -v github-actions \
-  | grep -v dependabot \
   | grep -v renovate \
-  | grep -v opentelemetrybot \
   | grep -v otelbot \
   | sed 's/^/@/'