ref(core): Remove duplicate logic in scope.update

[AbhiPrasad]

Found when examining minified bundle for v8 (to see if treeshaking working properly everywhere).

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback)	76.35 KB (-0.06% 🔽)
@sentry/browser (incl. Tracing, Replay)	67.62 KB (-0.06% 🔽)
@sentry/browser (incl. Tracing, Replay with Canvas)	71.46 KB (-0.06% 🔽)
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	61.18 KB (-0.07% 🔽)
@sentry/browser (incl. Tracing)	32.31 KB (-0.11% 🔽)
@sentry/browser (incl. browserTracingIntegration)	32.31 KB (-0.11% 🔽)
@sentry/browser (incl. feedbackIntegration)	31.33 KB (-0.14% 🔽)
@sentry/browser (incl. feedbackModalIntegration)	31.45 KB (-0.14% 🔽)
@sentry/browser (incl. feedbackScreenshotIntegration)	31.45 KB (-0.14% 🔽)
@sentry/browser (incl. sendFeedback)	27.42 KB (-0.15% 🔽)
@sentry/browser	22.57 KB (-0.18% 🔽)
CDN Bundle (incl. Tracing, Replay, Feedback)	71.34 KB (-0.08% 🔽)
CDN Bundle (incl. Tracing, Replay)	66.09 KB (-0.08% 🔽)
CDN Bundle (incl. Tracing)	32.41 KB (-0.15% 🔽)
CDN Bundle	23.8 KB (-0.23% 🔽)
CDN Bundle (incl. Tracing, Replay) - uncompressed	206.1 KB (-0.15% 🔽)
CDN Bundle (incl. Tracing) - uncompressed	96.75 KB (-0.32% 🔽)
CDN Bundle - uncompressed	70.24 KB (-0.44% 🔽)
@sentry/react (incl. Tracing, Replay)	67.6 KB (-0.06% 🔽)
@sentry/react	22.6 KB (-0.17% 🔽)