Remove @Override from CouchBasePackage.java

[tusharvikky]

Hello,

I tried setting the package onto my react-native project but Android app failed with error:

/Users/tushardeo/Sites/project/node_modules/react-native-couchbase/android/src/main/java/com/CouchBase/CouchBasePackage.java:20: error: method does not override or implement a method from a supertype
    @Override
    ^
Note: /Users/tushardeo/Sites/project/node_modules/react-native-couchbase/android/src/main/java/com/CouchBase/CouchBase.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error
:CouchBase:compileReleaseJavaWithJavac FAILED

Removing https://github.com/Upinion/react-native-couchbase-lite/blob/master/android/src/main/java/com/CouchBase/CouchBasePackage.java#L20 fixes it.