Replace all throw error(...) with just error(...)

`throw` is not needed in this case, because `error(...)` already
  raises exception (so `throw` is unreachable). Also after previous
  commit compiler reports `UNREACHABLE_CODE` warning on such `throw`

libraries/tools/kotlin-gradle-plugin-npm-versions-codegen/src/main/kotlin/org/jetbrains/kotlin/generators/gradle/targets/js/main.kt

@@ -59,7 +59,7 @@ fun findLastVersions(packages: List<PackageInformation>): List<Package> {
                     .filter { it.preRelease == null && it.build == null }
                     .maxOrNull()
                     ?.toString()
-                    ?: throw error("There is no applicable version for ${packageInformation.name}")
+                    ?: error("There is no applicable version for ${packageInformation.name}")
                 is HardcodedPackageInformation -> packageInformation.version
             }
 
@@ -69,4 +69,4 @@ fun findLastVersions(packages: List<PackageInformation>): List<Package> {
                 packageInformation.displayName
             )
         }
-}
+}