Tests: remove the 250ms per run pause

We're stable enough to not need this anymore, yay for faster runs!

StackExchange.Redis.Tests/Cluster.cs

@@ -432,7 +432,7 @@ public void Keys(string pattern, int pageSize)
 
         public void HashSlots(string key, int slot)
         {
-            using (var muxer = Create(connectTimeout: 5000, pause: false))
+            using (var muxer = Create(connectTimeout: 5000))
             {
                 Assert.Equal(slot, muxer.HashSlot(key));
             }

StackExchange.Redis.Tests/TestBase.cs

@@ -211,11 +211,10 @@ protected IServer GetAnyMaster(ConnectionMultiplexer muxer)
             string clientName = null, int? syncTimeout = null, bool? allowAdmin = null, int? keepAlive = null,
             int? connectTimeout = null, string password = null, string tieBreaker = null, TextWriter log = null,
             bool fail = true, string[] disabledCommands = null, string[] enabledCommands = null,
-            bool checkConnect = true, bool pause = true, string failMessage = null,
+            bool checkConnect = true, string failMessage = null,
             string channelPrefix = null, Proxy? proxy = null,
             [CallerMemberName] string caller = null)
         {
-            if (pause) Thread.Sleep(250); // get a lot of glitches when hammering new socket creations etc; pace it out a bit
             string configuration = GetConfiguration();
             var config = ConfigurationOptions.Parse(configuration);
             if (disabledCommands != null && disabledCommands.Length != 0)