fix[dtl]: remove old stringification function (#1134)

* fix[dtl]: remove old stringification function

* chore: add changeset

.changeset/gold-grapes-beg.md

+---
+'@eth-optimism/data-transport-layer': patch
+---
+
+Removes a function that was previously used for backwards compatibility but is no longer necessary

packages/data-transport-layer/src/db/transport-db.ts

@@ -387,27 +387,6 @@ export class TransportDB {
     startIndex: number,
     endIndex: number
   ): Promise<TEntry[] | []> {
-    const entries = await this.db.range<TEntry>(
-      `${key}:index`,
-      startIndex,
-      endIndex
-    )
-    const results = []
-    for (const entry of entries) {
-      results.push(stringify(entry))
-    }
-    return results
-  }
-}
-
-const stringify = (entry) => {
-  if (entry === null || entry === undefined) {
-    return entry
-  }
-  if (entry.gasLimit) {
-    entry.gasLimit = BigNumber.from(entry.gasLimit).toString()
-  }
-  if (entry.decoded) {
-    entry.decoded.gasLimit = BigNumber.from(entry.decoded.gasLimit).toString()
+    return this.db.range<TEntry>(`${key}:index`, startIndex, endIndex)
   }
 }