Update raymarching.fs

examples/shaders/resources/shaders/glsl120/raymarching.fs

@@ -1,13 +1,9 @@
-//Ported by CDM to work on older hardware.
 #version 120
 
 // Input vertex attributes (from vertex shader)
 varying vec2 fragTexCoord;
 varying vec4 fragColor;
 
-// Output fragment color
-vec4 finalColor;
-
 uniform vec3 viewEye;
 uniform vec3 viewCenter;
 uniform float runTime;