Import GL shader resources on static builds unconditionally.

It's faster that way because it doesn't involve a linear lookup, if the
resource is already imported it's a constant-time check and it becomes a
no-op.

src/Magnum/DebugTools/TextureImage.cpp

@@ -81,8 +81,6 @@ class FloatReinterpretShader: public GL::AbstractShaderProgram {
 
 FloatReinterpretShader::FloatReinterpretShader() {
     #ifdef MAGNUM_BUILD_STATIC
-    /* Import resources on static build, if not already */
-    if(!Utility::Resource::hasGroup("MagnumDebugTools"_s))
     importDebugToolsResources();
     #endif
     Utility::Resource rs{"MagnumDebugTools"};

src/Magnum/Shaders/DistanceFieldVectorGL.cpp

@@ -117,8 +117,6 @@ template<UnsignedInt dimensions> typename DistanceFieldVectorGL<dimensions>::Com
     #endif
 
     #ifdef MAGNUM_BUILD_STATIC
-    /* Import resources on static build, if not already */
-    if(!Utility::Resource::hasGroup("MagnumShadersGL"_s))
     importShaderResources();
     #endif
     Utility::Resource rs("MagnumShadersGL"_s);

src/Magnum/Shaders/FlatGL.cpp

@@ -155,8 +155,6 @@ template<UnsignedInt dimensions> typename FlatGL<dimensions>::CompileState FlatG
     #endif
 
     #ifdef MAGNUM_BUILD_STATIC
-    /* Import resources on static build, if not already */
-    if(!Utility::Resource::hasGroup("MagnumShadersGL"_s))
     importShaderResources();
     #endif
     Utility::Resource rs("MagnumShadersGL"_s);

src/Magnum/Shaders/LineGL.cpp

@@ -108,8 +108,6 @@ template<UnsignedInt dimensions> typename LineGL<dimensions>::CompileState LineG
     }
 
     #ifdef MAGNUM_BUILD_STATIC
-    /* Import resources on static build, if not already */
-    if(!Utility::Resource::hasGroup("MagnumShadersGL"_s))
     importShaderResources();
     #endif
     Utility::Resource rs{"MagnumShadersGL"_s};

src/Magnum/Shaders/MeshVisualizerGL.cpp

@@ -160,8 +160,6 @@ void MeshVisualizerGLBase::assertExtensions(const FlagsBase flags) {
     #endif
 
     #ifdef MAGNUM_BUILD_STATIC
-    /* Import resources on static build, if not already */
-    if(!Utility::Resource::hasGroup("MagnumShadersGL"_s))
     importShaderResources();
     #endif
 }

src/Magnum/Shaders/PhongGL.cpp

@@ -173,8 +173,6 @@ PhongGL::CompileState PhongGL::compile(const Configuration& configuration) {
     #endif
 
     #ifdef MAGNUM_BUILD_STATIC
-    /* Import resources on static build, if not already */
-    if(!Utility::Resource::hasGroup("MagnumShadersGL"_s))
     importShaderResources();
     #endif
     Utility::Resource rs("MagnumShadersGL"_s);

src/Magnum/Shaders/VectorGL.cpp

@@ -117,8 +117,6 @@ template<UnsignedInt dimensions> typename VectorGL<dimensions>::CompileState Vec
     #endif
 
     #ifdef MAGNUM_BUILD_STATIC
-    /* Import resources on static build, if not already */
-    if(!Utility::Resource::hasGroup("MagnumShadersGL"_s))
     importShaderResources();
     #endif
     Utility::Resource rs("MagnumShadersGL"_s);

src/Magnum/Shaders/VertexColorGL.cpp

@@ -104,8 +104,6 @@ template<UnsignedInt dimensions> typename VertexColorGL<dimensions>::CompileStat
     #endif
 
     #ifdef MAGNUM_BUILD_STATIC
-    /* Import resources on static build, if not already */
-    if(!Utility::Resource::hasGroup("MagnumShadersGL"_s))
     importShaderResources();
     #endif
     Utility::Resource rs("MagnumShadersGL"_s);

src/Magnum/TextureTools/DistanceFieldGL.cpp

@@ -82,8 +82,6 @@ class DistanceFieldShader: public GL::AbstractShaderProgram {
 
 DistanceFieldShader::DistanceFieldShader(const UnsignedInt radius) {
     #ifdef MAGNUM_BUILD_STATIC
-    /* Import resources on static build, if not already */
-    if(!Utility::Resource::hasGroup("MagnumTextureTools"_s))
     importTextureToolResources();
     #endif
     Utility::Resource rs("MagnumTextureTools"_s);