chore: Remove leftover merge conflict marker from gradle.properties

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: runningcode

plugin-build/gradle.properties

@@ -9,7 +9,6 @@ name = sentry-android-gradle-plugin
 group = io.sentry
 version = 6.4.0-alpha.1
 sdk_version = 8.37.1
->>>>>>> 0501ba8 (release: 6.4.0-alpha.1)
 
 # publication pom properties
 POM_NAME=Sentry Android Gradle Plugin