Remove CSS handling from Table

Drop the loadCSS method and its constructor call. Styling is now the
consumer's responsibility via the emitted class names, keeping the
class self-contained and free of app-specific asset paths.

abstract-table.ts

@@ -38,8 +38,6 @@ export abstract class Table<TRow extends Object> {
 
         this.table.appendChild(this.tableBody);
 
-        this.loadCSS()
-
         this.messageEl = messageElement === undefined ? document.createElement("p") : messageElement;
     }
 
@@ -83,19 +81,6 @@ export abstract class Table<TRow extends Object> {
         this.table.appendChild(thead);
     }
 
-
-    /**
-     * Loads the CSS for tables into the html file for custom styling.
-     * @param relativePathAndName The path to go to for the cess file, including the filename and extension.
-     */
-    loadCSS(relativePathAndName: string) {
-        const link = document.createElement("link");
-        link.rel = "stylesheet"
-        link.href = relativePathAndName; 
-        link.type = 'text/css';
-        document.head.appendChild(link);
-    }
-
     /**
      * Returns the table element of this instance for putting onto a page.
      */