Proper Way to Remove Mysql Tables
Just remove all three of the correlated table data files from the file system and that should ensure all traces are removed as per my understanding of 15.2 The MyISAM Storage Engine 

Each MyISAM table is stored on disk in three files:


.frm
.MYD
.MYI



  Each MyISAM table is stored on disk in three files. The files have
  names that begin with the table name and have an extension to indicate
  the file type. An .frm file stores the table format. The data file has
  an .MYD (MYData) extension. The index file has an .MYI (MYIndex)
  extension.
  
  Source




Further Resources


1.6.3 How to Repair MyISAM Tables