Remove unused `initialize_ref` #35417

Job	Run time
📊 Static checks / Code style, file formatting, and docs	36s
🍎 macOS / Editor (target=editor, tests=yes)	28m 6s
🍎 macOS / Template (target=template_release)	18m 53s
🤖 Android / Editor (target=editor)	23m 3s
🤖 Android / Template arm32 (target=template_release, arch=arm32)	14m 50s
🤖 Android / Template arm64 (target=template_release, arch=arm64)	15m 2s
🍏 iOS / Template (target=template_release)	8m 26s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	22m 26s
🐧 Linux / Editor w/ Mono (target=editor)	34m 56s
🌐 Web / Template w/o threads (target=template_release, threads=no)	23m 13s
🐧 Linux / Editor with doubles and GCC sanitizers (target=editor, tests=yes, dev_build=yes, scu_build=yes, precision=double, use_asan=yes, use_ubsan=yes, linker=gold)	41m 45s
🏁 Windows / Editor (target=editor, tests=yes)	43m 12s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	31m 45s
🏁 Windows / Template (target=template_release)	29m 30s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	30m 3s
🐧 Linux / Template w/ Mono (target=template_release)	21m 48s
🐧 Linux / Minimal template (target=template_release, everything disabled)	16m 4s
🪲 Godot CPP / Build and test Godot CPP	7m 58s
	6h 51m 36s

Provide feedback