Don't upload symbols to DO anymore (#41317)

Sentry now symbolicates stack traces, no need to make our builds slower

Release Notes:

- N/A

script/install-mold

@@ -12,13 +12,11 @@
 
 set -euo pipefail
 
-MOLD_VERSION="${MOLD_VERSION:-${1:-}}"
+MOLD_VERSION="2.34.0"
+
 if [ "$(uname -s)" != "Linux" ]; then
     echo "Error: This script is intended for Linux systems only."
     exit 1
-elif [ -z "$MOLD_VERSION" ]; then
-    echo "Usage: $0 2.34.0"
-    exit 1
 elif [ -e /usr/local/bin/mold ]; then
     echo "Warning: existing mold found at /usr/local/bin/mold. Skipping installation."
     exit 0