update gradle.properties for release

Author: JulianKast

android/sdl_android/gradle.properties

@@ -16,15 +16,6 @@ POM_LICENCE_NAME=BSD 3-Clause
 POM_LICENCE_URL=https://opensource.org/licenses/BSD-3-Clause
 POM_LICENCE_DIST=repo
 
-RELEASE_REPOSITORY_URL=https://s01.oss.sonatype.org/service/local/staging/deploy/maven2/
-SNAPSHOT_REPOSITORY_URL=https://s01.oss.sonatype.org/content/repositories/snapshots/
-
 POM_DEVELOPER_ID=
 POM_DEVELOPER_NAME=
 POM_DEVELOPER_URL=
-
-signing.keyId=
-signing.password=
-signing.secretKeyRingFile=
-SONATYPE_NEXUS_USERNAME=
-SONATYPE_NEXUS_PASSWORD=