[TEST] Remove obsolete PhongMaterialTest

Our nightly Hudson test job failed with the following error in the newly added PhongMaterialTest:

-do-test-run:
    [junit] Testsuite: javafx.scene.PhongMaterialTest
    [junit] ------------- Standard Error -----------------
    [junit] Graphics Device initialization failed for : es2
    [junit] Error initializing QuantumRenderer: no suitable pipeline found
    [junit] java.lang.RuntimeException: java.lang.RuntimeException: Error initializing QuantumRenderer: no suitable pipeline found
    [junit] at com.sun.javafx.tk.quantum.QuantumRenderer.getInstance(QuantumRenderer.java:303)
    [junit] at com.sun.javafx.tk.quantum.QuantumToolkit.init(QuantumToolkit.java:333)
    [junit] at com.sun.javafx.tk.Toolkit.getToolkit(Toolkit.java:199)
    [junit] at com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:166)
    [junit] at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:616)
    [junit] at com.sun.javafx.application.LauncherImpl.access$000(LauncherImpl.java:56)
    [junit] at com.sun.javafx.application.LauncherImpl$1.run(LauncherImpl.java:150)
    [junit] at java.lang.Thread.run(Thread.java:722)
    [junit] Caused by: java.lang.RuntimeException: Error initializing QuantumRenderer: no suitable pipeline found
    [junit] at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.init(QuantumRenderer.java:98)
    [junit] at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:130)
    [junit] ... 1 more
    [junit] Exception in thread "Thread-0" java.lang.RuntimeException: No toolkit found
    [junit] at com.sun.javafx.tk.Toolkit.getToolkit(Toolkit.java:211)
    [junit] at com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:166)
    [junit] at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:616)
    [junit] at com.sun.javafx.application.LauncherImpl.access$000(LauncherImpl.java:56)
    [junit] at com.sun.javafx.application.LauncherImpl$1.run(LauncherImpl.java:150)
    [junit] at java.lang.Thread.run(Thread.java:722)
    [junit] Graphics Device initialization failed for : es2
    [junit] Error initializing QuantumRenderer: no suitable pipeline found
    [junit] java.lang.RuntimeException: java.lang.RuntimeException: Error initializing QuantumRenderer: no suitable pipeline found
    [junit] at com.sun.javafx.tk.quantum.QuantumRenderer.getInstance(QuantumRenderer.java:303)
    [junit] at com.sun.javafx.tk.quantum.QuantumToolkit.init(QuantumToolkit.java:333)
    [junit] at com.sun.javafx.tk.Toolkit.getToolkit(Toolkit.java:199)
    [junit] at com.sun.javafx.application.PlatformImpl.isFxApplicationThread(PlatformImpl.java:190)
    [junit] at com.sun.javafx.application.PlatformImpl.runAndWait(PlatformImpl.java:248)
    [junit] at com.sun.javafx.application.PlatformImpl.tkExit(PlatformImpl.java:365)
    [junit] at com.sun.javafx.application.PlatformImpl.exit(PlatformImpl.java:387)
    [junit] at javafx.application.Platform.exit(Platform.java:84)
    [junit] at javafx.scene.PhongMaterialTest.teardownOnce(PhongMaterialTest.java:134)
    [junit] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    [junit] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    [junit] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    [junit] at java.lang.reflect.Method.invoke(Method.java:601)
    [junit] at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    [junit] at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    [junit] at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    [junit] at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:37)
    [junit] at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    [junit] at junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:39)
    [junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:518)
    [junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:1052)
    [junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:906)
    [junit] Caused by: java.lang.RuntimeException: Error initializing QuantumRenderer: no suitable pipeline found
    [junit] at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.init(QuantumRenderer.java:98)
    [junit] at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:130)
    [junit] at java.lang.Thread.run(Thread.java:722)
    [junit] ------------- ---------------- ---------------
    [junit] Testcase: javafx.scene.PhongMaterialTest: FAILED
    [junit] Timeout waiting for Application to launch
    [junit] junit.framework.AssertionFailedError: Timeout waiting for Application to launch
    [junit] at javafx.scene.PhongMaterialTest.setupOnce(PhongMaterialTest.java:121)
    [junit]
    [junit]
    [junit] Testcase: javafx.scene.PhongMaterialTest: Caused an ERROR
    [junit] No toolkit found
    [junit] java.lang.RuntimeException: No toolkit found
    [junit] at com.sun.javafx.tk.Toolkit.getToolkit(Toolkit.java:211)
    [junit] at com.sun.javafx.application.PlatformImpl.isFxApplicationThread(PlatformImpl.java:190)
    [junit] at com.sun.javafx.application.PlatformImpl.runAndWait(PlatformImpl.java:248)
    [junit] at com.sun.javafx.application.PlatformImpl.tkExit(PlatformImpl.java:365)
    [junit] at com.sun.javafx.application.PlatformImpl.exit(PlatformImpl.java:387)
    [junit] at javafx.application.Platform.exit(Platform.java:84)
    [junit] at javafx.scene.PhongMaterialTest.teardownOnce(PhongMaterialTest.java:134)
    [junit]
    [junit]
    [junit] GL_VERSION (major.minor) = 1.1
    [junit] Test javafx.scene.PhongMaterialTest FAILED