Fix compiler warnings

src/redis_cache.nim

@@ -22,7 +22,7 @@ proc migrate*(key, match: string) {.async.} =
       let list = await r.scan(newCursor(0), match, 100000)
       r.startPipelining()
       for item in list:
-        if item != "p:" or item == match:
+        if item == match:
           discard await r.del(item)
       await r.setk(key, "true")
       discard await r.flushPipeline()
@@ -35,6 +35,7 @@ proc initRedisPool*(cfg: Config) {.async.} =
     await migrate("snappyRss", "rss:*")
     await migrate("oldFrosty", "*")
     await migrate("userBuckets", "p:")
+    await migrate("profileDates", "p:")
 
     pool.withAcquire(r):
       await r.configSet("hash-max-ziplist-entries", "1000")