Simplify graphics pipeline by unifying shader module usage and cleaning up unused code

Author: gpx1000

attachments/31_compute_shader.cpp

@@ -420,10 +420,8 @@ class ComputeShaderApplication {
 
 
     void createGraphicsPipeline() {
-        vk::raii::ShaderModule fragShaderModule = createShaderModule(readFile("shaders/frag.spv"));
         vk::raii::ShaderModule shaderModule = createShaderModule(readFile("shaders/slang.spv"));
 
-        // vk::PipelineShaderStageCreateInfo fragShaderStageInfo{ .stage = vk::ShaderStageFlagBits::eFragment, .module = fragShaderModule, .pName ="main"};
         vk::PipelineShaderStageCreateInfo vertShaderStageInfo{ .stage = vk::ShaderStageFlagBits::eVertex, .module = shaderModule, .pName = "vertMain" };
         vk::PipelineShaderStageCreateInfo fragShaderStageInfo{ .stage = vk::ShaderStageFlagBits::eFragment, .module = shaderModule, .pName = "fragMain" };
         vk::PipelineShaderStageCreateInfo shaderStages[] = {vertShaderStageInfo, fragShaderStageInfo};