Make content use SWSL shaders.

Resources/Shaders/circlemask.swsl

@@ -1,5 +1,3 @@
-shader_type canvas_item;
-
 float circle(in vec2 _st, in float _radius){
     vec2 dist = _st-vec2(0.5);
 	return smoothstep(_radius-(_radius*0.01),
@@ -10,7 +8,6 @@ float circle(in vec2 _st, in float _radius){
 void fragment(){
 	vec2 st = FRAGCOORD.xy*SCREEN_PIXEL_SIZE.xy;
 
-	COLOR = texture(TEXTURE, UV);
 	COLOR.rgb = vec3(0);
     COLOR.a = circle(st,0.05);
 }

Resources/Shaders/gradientcirclemask.swsl

@@ -1,4 +1,3 @@
-shader_type canvas_item;
 uniform float percentagedistanceshow = 0.1;
 uniform float gradientfalloffwidth = 0.2;