Remove runewidth LUT creation

cell.go

@@ -244,6 +244,8 @@ func init() {
 	// might be more memory conscious.  If that's you, set the TCELL_MINIMIZE
 	// environment variable.
 	if os.Getenv("TCELL_MINIMIZE") == "" {
-		runewidth.CreateLUT()
+		// micro-editor/tcell: We do not want LUT creation because it worsens
+		// startup time.
+		// runewidth.CreateLUT()
 	}
 }