Remove private annotations from helper methods

[NullVoxPopuli]

Removed private annotations from multiple helper methods.

[github-actions]

📊 Size report

Tarball size — 1.2 MB → 1.2 MB

dist/dev   -0.01%↓

File	Before (Size / Brotli)	After (Size / Brotli)
./packages/@ember/helper/index.js	22.2 kB / 5.4 kB	-0.54%↓22.1 kB / -0.06%↓5.4 kB
Total (Includes all files)	2 MB / 478.1 kB	-0.01%↓2 MB / -0%↓478.1 kB

---

dist/prod   -0.01%↓

File	Before (Size / Brotli)	After (Size / Brotli)
./packages/@ember/helper/index.js	22.2 kB / 5.4 kB	-0.54%↓22.1 kB / -0.07%↓5.4 kB
./packages/shared-chunks/api-{hash}.js	8.3 kB / 1.8 kB	-28.6%↓5.9 kB / -17.3%↓1.5 kB
Total (Includes all files)	1.8 MB / 436.1 kB	-0.01%↓1.8 MB / -0%↓436.1 kB

---

smoke-tests/v2-app-hello-world-template/dist   No changes

File	Before (Size / Brotli)	After (Size / Brotli)
Total (Includes all files)	235 kB / 64.5 kB	235 kB / 64.5 kB

_{🤖 This report was automatically generated by wyvox/pkg-size}