Remove special UI test configuration that we don't need

build.gradle

 // to trigger a full tycho build please use 'gradle deleteFromClassPath completeInstall'
-import org.apache.tools.ant.taskdefs.condition.Os
 
 project.ext {
 	targetRepositories = [

tycho_build.gradle

-import org.apache.tools.ant.taskdefs.condition.Os
 /*
 	Build Script can be executed via 'gradle install'
 	Build Script Dependencies can be downloaded via 'gradle collectDepenencies'
@@ -562,25 +561,11 @@ def testArtifact(artifactId,versionNumber) {"""
 				<groupId>org.eclipse.tycho</groupId>
 				<artifactId>tycho-surefire-plugin</artifactId>
 				<version>\${tycho-version}</version>
-				<configuration>
-					<!-- <useUIHarness>true</useUIHarness> -->
-					<!-- <useUIThread>true</useUIThread> -->
-					${macTestArguments()}
-					<!-- <product>org.rodinp.platform.product</product> -->
-				</configuration>
 			</plugin>
 		</plugins>
 	</build>
 """}
 
-String macTestArguments() {
-	if (Os.isFamily(Os.FAMILY_MAC)) {
-		return "<argLine>-XstartOnFirstThread</argLine>\n"
-	} else {
-		return "\n"
-	}
-}
-
 
 def start() {"""\
 <?xml version="1.0" encoding="UTF-8"?>