Clean up.

src/renderers/shaders/ShaderLib/background_frag.glsl

@@ -1,4 +1,3 @@
-
 uniform sampler2D t2D;
 
 varying vec2 vUv;

src/renderers/shaders/ShaderLib/background_vert.glsl

@@ -1,4 +1,3 @@
-
 varying vec2 vUv;
 
 void main() {