Shader cleanup

core/assets/shaders/water.fragment

@@ -1,18 +0,0 @@
-#ifdef GL_ES
-precision mediump float;
-#endif
-varying vec4 v_color;
-varying vec2 v_texCoords;
-
-uniform sampler2D u_texture;
-uniform float u_time;
-
-float round(float f, float v){
-    return float(int(f / v)) * v;
-}
-
-void main(){
-    vec2 r = v_texCoords.xy;
-    vec4 c = v_color * texture2D(u_texture, v_texCoords.xy);
-    gl_FragColor = c * vec4(vec3(round(1.0 + sin((r.x + r.y) * 404.0 + u_time / 20.0) / 10.0, 0.05)), 1.0);
-}