Remove OpStorage export from replay-driver

[ChumpChief]

The OpStorage class is non-functional and unused, this change would remove it.

AB#7148

[msfluid-bot]

⯅ @fluid-example/bundle-size-tests: +187 Bytes

Metric Name	Baseline Size	Compare Size	Size Diff
aqueduct.js	511.82 KB	511.86 KB	⯅ +44 Bytes
connectionState.js	680 Bytes	680 Bytes	■ No change
containerRuntime.js	244.63 KB	244.65 KB	⯅ +22 Bytes
loader.js	170.65 KB	170.67 KB	⯅ +22 Bytes
map.js	46.41 KB	46.42 KB	⯅ +11 Bytes
matrix.js	149.11 KB	149.12 KB	⯅ +11 Bytes
odspDriver.js	96.8 KB	96.83 KB	⯅ +33 Bytes
odspPrefetchSnapshot.js	42.26 KB	42.29 KB	⯅ +22 Bytes
sharedString.js	168.49 KB	168.5 KB	⯅ +11 Bytes
sharedTree.js	333.77 KB	333.77 KB	■ No change
Total Size	1.87 MB	1.87 MB	⯅ +187 Bytes

---

Baseline commit: 9188d64

Generated by 🚫 dangerJS against 89b1f3c