Misc changes to engine and shaders

code/sectr/shaders/ve_blit_atlas.shdc.glsl

@@ -35,7 +35,6 @@ float down_sample_to_texture( vec2 uv, vec2 texture_size )
 
 void main()
 {
-	// const vec2 texture_size = 1.0f /  vec2( 2048.0f, 512.0f );
 	const vec2 texture_size = 1.0f / glyph_buffer_size;
 	if ( region == 0 || region == 1 || region == 2 || region == 4 )
 	{

code/sectr/shaders/ve_draw_text.shdc.glsl

@@ -32,7 +32,6 @@ void main()
 {
 	float alpha = texture(sampler2D( ve_draw_text_src_texture, ve_draw_text_src_sampler ), uv ).x;
 
-	// const vec2  texture_size = 1.0f / vec2( 2048.0f, 512.0f );
 	const vec2  texture_size = glyph_buffer_size;
 	const float down_sample  = 1.0f / over_sample;
 

code/sectr/shaders/ve_source_shared.shdc.glsl

@@ -1,6 +1,5 @@
 in  vec2 v_position;
 in  vec2 v_texture;
-// in vec4 v_elem;
 out vec2 uv;
 
 void main()