removed unmaintained gradle build system

PRIVACY

@@ -36,7 +36,7 @@ logs which are retained for 14 days.
 Build systems
 =============
 
-If you build JITWatch from source using maven or gradle then those build systems will download various further 
+If you build JITWatch from source using maven then the build system will download various further 
 dependencies required to compile, package, test, and execute the build targets.
 
 =======================

README.md

@@ -16,9 +16,6 @@ For pre-JDK11 you will need to use a Java runtime that includes JavaFX.
 <h2>maven</h2>
 <pre>mvn clean package && java -jar ui/target/jitwatch-ui-shaded.jar</pre>
 
-<h2>gradle</h2>
-<pre>gradlew clean build run</pre>
-
 <h2>Build an example HotSpot log</h2>
 <pre># Build the code and then run
 cd scripts && ./makeDemoLogFile.sh</pre>

core/src/test/java/org/adoptopenjdk/jitwatch/test/TestExecutionUtil.java

@@ -35,14 +35,6 @@ public class TestExecutionUtil
 			cp.add(path.toString());
 		}
 
-		// path for gradle build
-		path = FileSystems.getDefault().getPath(userDir, "build", "classes", "java", "test");
-
-		if (Files.exists(path))
-		{
-			cp.add(path.toString());
-		}
-
 		List<String> options = new ArrayList<>();
 		options.add("-XX:+UnlockDiagnosticVMOptions");
 		options.add("-XX:+LogCompilation");