fix: Don't fail if updating Kinesis stream Shard count; We support this! (#54530)

This added support for increasing shard count:
https://github.com/ansible/ansible/pull/24805

But the conditional to fail if you have specified a shard count other 
than the current shard count was still left in.

This removes that conditional since it's no longer needed and prevents 
you from actually updating things!

lib/ansible/modules/cloud/amazon/kinesis_stream.py

@@ -1030,11 +1030,6 @@ def create_stream(client, stream_name, number_of_shards=1, retention_period=None
             )
         )
 
-    if stream_found and not check_mode:
-        if current_stream['ShardsCount'] != number_of_shards:
-            err_msg = 'Can not change the number of shards in a Kinesis Stream'
-            return success, changed, err_msg, results
-
     if stream_found and current_stream.get('StreamStatus') != 'DELETING':
         success, changed, err_msg = update(
             client, current_stream, stream_name, number_of_shards,