fix: remove JavaProvider (#541)

* fix: remove JavaProvider

* Update revision and compatibleSinceVersion in pom.xml

Author: kuisathaverat

pom.xml

@@ -25,11 +25,11 @@
   </licenses>
 
   <properties>
-    <revision>2</revision>
+    <revision>3</revision>
     <changelist>999999-SNAPSHOT</changelist>
     <jenkins.baseline>2.479</jenkins.baseline>
     <jenkins.version>${jenkins.baseline}.1</jenkins.version>
-    <hpi.compatibleSinceVersion>2.0.0</hpi.compatibleSinceVersion>
+    <hpi.compatibleSinceVersion>3.0.0</hpi.compatibleSinceVersion>
   </properties>
 
   <developers>

src/main/java/hudson/plugins/sshslaves/DefaultJavaProvider.java

@@ -448,15 +448,9 @@ public void launch(final SlaveComputer computer, final TaskListener listener) th
                         return Boolean.FALSE;
                     }
 
-                    String java = null;
+                    String java = "java";
                     if (StringUtils.isNotBlank(javaPath)) {
-                        java = expandExpression(computer, javaPath);
-                    } else {
-                      checkJavaIsInPath(listener);
-                      //FIXME deprecated on 2020-12-10, it will removed after 2021-09-01
-                        JavaVersionChecker javaVersionChecker = new JavaVersionChecker(computer, listener, getJvmOptions(),
-                                connection);
-                        java = javaVersionChecker.resolveJava();
+                      java = expandExpression(computer, javaPath);
                     }
 
                     copyAgentJar(listener, workingDirectory);