Update README (#735)

- Remove logo as the file no longer exists
- Remove mention of blog as they're not offering that in general any
more

README.md

@@ -1,18 +1,10 @@
 <!--lint ignore double-link-->
 
-# Ecosystem ![ecosystem](https://img.shields.io/badge/Qiskit-Ecosystem-blueviolet) [![Awesome](https://awesome.re/badge.svg)](https://awesome.re) [![Tests](https://github.com/qiskit-community/ecosystem/actions/workflows/tests.yml/badge.svg?branch=main)](https://github.com/qiskit-community/ecosystem/actions/workflows/tests.yml)
+# Qiskit ecosystem
 
-<!--lint enable double-link-->
+![ecosystem](https://img.shields.io/badge/Qiskit-Ecosystem-blueviolet) [![Awesome](https://awesome.re/badge.svg)](https://awesome.re) [![Tests](https://github.com/qiskit-community/ecosystem/actions/workflows/tests.yml/badge.svg?branch=main)](https://github.com/qiskit-community/ecosystem/actions/workflows/tests.yml)
 
-<br />
-<p align="center">
-  <p align="center">
-    <a href="https://qiskit.org/">
-      <img alt="Qiskit" src="https://qiskit.org/images/qiskit-logo.png" width="70" />
-    </a>
-  </p>
-  <h3 align="center">Ecosystem</h3>
-</p>
+<!--lint enable double-link-->
 
 ## About the ecosystem
 
@@ -44,8 +36,7 @@ minutes.
 
 Members of the ecosystem are invited to give a presentation about their project
 at [Qiskit demo day](https://github.com/Qiskit/feedback/wiki/Qiskit-DemoDays).
-You can also write a post for the Qiskit blog; reach out to [Frank
-Harkins]([email protected]) if you're interested.
+Reach out to [Frank Harkins]([email protected]) if you're interested.
 
 ## How to update project information