fx: hypr shader

modules/desktop/windowShaders/rainbow.glsl

@@ -1,12 +1,6 @@
 //modified version of [this shader](https://github.com/wessles/GLSL-CRT/blob/master/shader.frag)
 const float scaleFactor = 0.7;
 
-float clamp(float x, float min, float max) {
-  if (x > max) return max;
-  if (x < min) return min;
-  return x;
-}
-
 void windowShader(inout vec4 color) {
   // color += vec4(cos(x_TexCoord.x)/4., sin(x_TexCoord.y)/4., 0., 1.);
   color += vec4(cos(v_texcoord.x)/4., cos(v_texcoord.y)/8., sin(v_texcoord.y)/4., 1.);