clean up old files

src/video_core/host_shaders/vulkan_blit_color_float.frag

@@ -1,13 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-#version 450
-
-layout(binding = 0) uniform sampler2D tex;
-
-layout(location = 0) in vec2 texcoord;
-layout(location = 0) out vec4 color;
-
-void main() {
-    color = textureLod(tex, texcoord, 0);
-}