fix: only drop /bin/java symlink

Maven plugin in rockcraft will work if we drop /bin/java symlink.
The JAVA_HOME variable will be set by java plugin

rockcraft/plugins/maven_plugin.py

@@ -30,16 +30,9 @@ class MavenPlugin(maven_plugin.MavenPlugin):
     use and install the Java VM. Specifically:
 
     - Do not link java executable to /bin/java
-    - Do not include staging area in the PATH
     """
 
     @override
     def _get_java_link_commands(self) -> list[str]:
         """Get the bash commands to provide /bin/java symlink."""
         return []
-
-    @override
-    def get_build_environment(self) -> dict[str, str]:
-        env = super().get_build_environment()
-        env["PATH"] = "/usr/bin:$PATH"
-        return env

tests/spread/rockcraft/plugin-maven/task.yaml

@@ -6,18 +6,12 @@ execute: |
 
   # Build the rock & load it into docker
   run_rockcraft pack
-  ls
   echo expecting ${ROCK_FILE}
   test -f ${ROCK_FILE}
   rockcraft.skopeo copy --insecure-policy  oci-archive:${ROCK_FILE} docker-daemon:${IMAGE}
-  docker images
   rm ${ROCK_FILE}
 
   # Run the packaged project
   docker run --rm $IMAGE exec /usr/lib/jvm/java-21-openjdk-amd64/bin/java -jar /jar/sample-0.0.1-SNAPSHOT.jar | MATCH "hello world"
 
   docker system prune -a -f
-
-  # Rebuild the java project to confirm that it rebuilds cleanly
-  touch sample/src/main/java/test/Test.java
-  rockcraft pack