ref(replay): Remove unused _triggerFullSnapshot

[mydea]

This is not used since we reworked our session refresh flow to just start>stop.

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	77.39 KB (-0.06% 🔽)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	66.45 KB (-0.05% 🔽)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	30.94 KB (0%)
@sentry/browser - Webpack (gzipped)	21.26 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	67.63 KB (-0.05% 🔽)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	28.93 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped)	21.09 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	216.33 KB (-0.03% 🔽)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	87.77 KB (0%)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	62.76 KB (0%)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	31.71 KB (0%)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	77.78 KB (-0.06% 🔽)
@sentry/react - Webpack (gzipped)	21.29 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	94.12 KB (-0.05% 🔽)
@sentry/nextjs Client - Webpack (gzipped)	47.83 KB (0%)