Remove duplicated codecov badge

Fixes #4893.

README.md

@@ -7,7 +7,6 @@ Ballerina Random Library
   [![GraalVM Check](https://github.com/ballerina-platform/module-ballerina-random/actions/workflows/build-with-bal-test-graalvm.yml/badge.svg)](https://github.com/ballerina-platform/module-ballerina-random/actions/workflows/build-with-bal-test-graalvm.yml)
   [![GitHub Last Commit](https://img.shields.io/github/last-commit/ballerina-platform/module-ballerina-random.svg)](https://github.com/ballerina-platform/module-ballerina-random/commits/main)
   [![Github issues](https://img.shields.io/github/issues/ballerina-platform/ballerina-standard-library/module/random.svg?label=Open%20Issues)](https://github.com/ballerina-platform/ballerina-standard-library/labels/module%2Frandom)
-  [![codecov](https://codecov.io/gh/ballerina-platform/module-ballerina-random/branch/main/graph/badge.svg)](https://codecov.io/gh/ballerina-platform/module-ballerina-random)
 
 This library provides APIs to generate pseudo-random numbers.
 

changelog.md

@@ -8,6 +8,7 @@ This file contains all the notable changes done to the Ballerina TCP package thr
 ### Changed
 
 - [Make `createIntInRange` work for full int range ](https://github.com/ballerina-platform/ballerina-standard-library/issues/4744)
+- [Remove duplicated codecov badge](https://github.com/ballerina-platform/ballerina-standard-library/issues/4893)
 
 ## [1.5.0] - 2023-09-15