refactor(bundler): Simplify the description fallback logic

Turns out that `info` is a synthetic field that itself implements a
fallback from `description` to `summary`, see [1]. This is a fixup for
7193af3.

[1]: https://github.com/rubygems/rubygems.org/blob/e7faec5ad1b43162368b77e0f4add8f6bd932cbb/app/models/version.rb#L255-L257

Signed-off-by: Sebastian Schuberth <sebastian@doubleopen.org>

plugins/package-managers/bundler/src/main/kotlin/Bundler.kt

@@ -453,17 +453,13 @@ internal data class GemSpec(
                 RemoteArtifact.EMPTY
             }
 
-            val description = sequenceOf(node["description"], node["summary"], node["info"]).mapNotNull { text ->
-                text?.textValue()?.takeIf { it.isNotEmpty() }
-            }.firstOrNull()
-
             return GemSpec(
                 node["name"].textValue(),
                 node["version"].textValue(),
                 node["homepage_uri"].textValueOrEmpty(),
                 node["authors"].textValueOrEmpty().split(',').mapToSetOfNotEmptyStrings(),
                 node["licenses"]?.toList().mapToSetOfNotEmptyStrings(),
-                description.orEmpty(),
+                node["info"].textValueOrEmpty(),
                 runtimeDependencies.orEmpty(),
                 vcs,
                 artifact