PE 13 - how to delete an edit point and join clips

No. Once there is a cut, it stays there.  In practice it does not matter because at output the two separated clips act as one.  Not a frame is missed.

One exception is that if it is an accidental cut, a Ctrl or Cmd Z will back up and you can back up several "mistakes".

If you must glue the two part together you can set the WorkArea Bars at the ends you want and check the WorkArea Only box at output.  Match the output to the project settings.  The output clip will in theory be of a little less quality due to the output rendering process and it will include any adjustments you've made.  But, the output clip can be used to replace your "broken" clip with little or no visual difference.