Folders rename for consistency on shaders version

shaders/gl330/posterization.fs

@@ -1,26 +0,0 @@
-#version 330
-
-in vec2 fragTexCoord;
-
-out vec4 fragColor;
-
-uniform sampler2D texture0;
-uniform vec4 fragTintColor;
-
-// NOTE: Add here your custom variables
-
-float gamma = 0.6;
-float numColors = 8.0;
-
-void main()
-{
-    vec3 color = texture(texture0, fragTexCoord.xy).rgb;
-    
-    color = pow(color, vec3(gamma, gamma, gamma));
-    color = color*numColors;
-    color = floor(color);
-    color = color/numColors;
-    color = pow(color, vec3(1.0/gamma));
-    
-    fragColor = vec4(color, 1.0);
-}