shaders: Fix damage vertex shader

shaders/damage-vertex.glsl

@@ -1,5 +1,3 @@
-uniform mat2 u_proj;
-
 attribute vec2 pos;
 attribute vec2 texture;
 
@@ -8,5 +6,5 @@ varying vec2 v_texture;
 void main()
 {
 	v_texture = texture;
-	gl_Position = vec4(u_proj * pos, 0, 1);
+	gl_Position = vec4(pos, 0, 1);
 }