Revert "xterm: enable macbook options key as modifier for copy-and-paste (#914)"

This reverts commit 2b4dbacc10.

html/src/components/app.tsx

@@ -21,8 +21,6 @@ const clientOptions = {
 const termOptions = {
     fontSize: 13,
     fontFamily: 'Menlo For Powerline,Consolas,Liberation Mono,Menlo,Courier,monospace',
-    macOptionClickForcesSelection: true,
-    macOptionIsMeta: true,
     theme: {
         foreground: '#d2d2d2',
         background: '#2b2b2b',