Remove banner image from README

Removed banner image from README.

Author: TutorialsAndroid

README.md

@@ -1,7 +1,3 @@
-<p align="center">
-  <img src="https://raw.githubusercontent.com/TutorialsAndroid/KAlertFlutter/master/art/banner.png" alt="KAlertFlutter Banner" />
-</p>
-
 <h1 align="center">KAlertFlutter</h1>
 
 <p align="center">
@@ -1039,4 +1035,4 @@ SOFTWARE.
 
 <p align="center">
   If this package helps you, please ⭐ star the repository and 👍 like the package on pub.dev.
-</p>
+</p>