Test: fixed various unused function warnings.

src/Magnum/GL/Test/AbstractShaderProgramTest.cpp

@@ -54,10 +54,7 @@ void AbstractShaderProgramTest::constructNoCreate() {
 }
 
 void AbstractShaderProgramTest::constructCopy() {
-    class DummyShader: public AbstractShaderProgram {
-        public:
-            explicit DummyShader() {}
-    };
+    class DummyShader: public AbstractShaderProgram {};
 
     CORRADE_VERIFY(!(std::is_constructible<DummyShader, const DummyShader&>{}));
     CORRADE_VERIFY(!(std::is_assignable<DummyShader, const DummyShader&>{}));

src/Magnum/GL/Test/TextureArrayGLTest.cpp

@@ -82,7 +82,9 @@ struct TextureArrayGLTest: OpenGLTester {
     #ifndef MAGNUM_TARGET_GLES
     void samplingSwizzle1D();
     #endif
+    #if !defined(MAGNUM_TARGET_GLES2) && !defined(MAGNUM_TARGET_WEBGL)
     void samplingSwizzle2D();
+    #endif
 
     #ifndef MAGNUM_TARGET_GLES
     void samplingBorderInteger1D();

src/Magnum/Shapes/Test/CapsuleTest.cpp

@@ -40,7 +40,6 @@ struct CapsuleTest: TestSuite::Tester {
     explicit CapsuleTest();
 
     void transformed();
-    void transformedAverageScaling();
     void collisionPoint();
     void collisionSphere();
 };

src/Magnum/Shapes/Test/CylinderTest.cpp

@@ -40,7 +40,6 @@ struct CylinderTest: TestSuite::Tester {
     explicit CylinderTest();
 
     void transformed();
-    void transformedAverageScaling();
     void collisionPoint();
     void collisionSphere();
 };

src/Magnum/TextureTools/Test/DistanceFieldGLTest.cpp

@@ -54,7 +54,9 @@ struct DistanceFieldGLTest: GL::OpenGLTester {
     explicit DistanceFieldGLTest();
 
     void test();
+    #ifndef MAGNUM_TARGET_WEBGL
     void benchmark();
+    #endif
 
     private:
         PluginManager::Manager<Trade::AbstractImporter> _manager;