Delete unused shader

blur.frag

-#version 440
-
-layout(location = 0) in vec2 qt_TexCoord0;
-layout(location = 0) out vec4 fragColor;
-
-layout(std140, binding = 0) uniform buf {
-    mat4 qt_Matrix;
-    float qt_Opacity;
-    vec2 step;
-    int radius;
-};
-layout(binding = 1) uniform sampler2D src;
-
-void main(void)
-{
-    vec3 sum = vec3(0.0, 0.0, 0.0);
-    for (int x = -radius; x <= radius; ++x) {
-        for (int y = -radius; y <= radius; ++y) {
-            vec2 c = qt_TexCoord0 + vec2(x, y) * step;
-            sum += texture(src, c).rgb;
-        }
-    }
-
-    fragColor = vec4(sum / ((radius*2 + 1) * (radius*2 + 1)), 1.0);
-}