Start the lighting chapters

shaders/vert.glsl

@@ -1,15 +1,11 @@
 #version 330 core
 
 layout(location=0) in vec3 position;
-layout(location=1) in vec2 uv;
 
 uniform mat4 model;
 uniform mat4 view;
 uniform mat4 projection;
 
-out vec2 tex_coords;
-
 void main() {
-  tex_coords  = uv;
   gl_Position = projection * view * model * vec4(position, 1.0);
 };