remove yeoman from entery point

Author: OsamaRab3

src/app/index.ts

@@ -1,9 +1,8 @@
-import * as Generator from "yeoman-generator";
 
-export default class extends Generator {
+export default class {
   displayInfo(): void {
     const url = "https://github.com/hyperledger-labs/fablo";
-    console.log("This is main entry point for Yeoman app used in Fablo.");
+    console.log("This is the main entry point for Fablo.");
     console.log("Visit the project page to get more information.");
     console.log(`---\n${url}\n---`);
   }