Make the code less Italian by removing issues caused by copy-pasta

ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/Filtering.hlsl

 #ifndef UNITY_FILTERING_INCLUDED
 #define UNITY_FILTERING_INCLUDED
 
-#if !defined(SHADER_API_GLES)
-
 // Cardinal (interpolating) B-Spline of the 2nd degree (3rd order). Support = 3x3.
 // The fractional coordinate of each part is assumed to be in the [0, 1] range (centered on 0.5).
 // https://www.desmos.com/calculator/47j9r9lolm
     offsets[0] = -0.5 + 0.5 * m * rcp(weights[0]);
     offsets[1] =  0.5 + r * rcp(weights[1]);
 }
-
-#endif // SHADER_API_GLES
 
 #endif // UNITY_FILTERING_INCLUDED

ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/GeometricTools.hlsl

     float c = dot(start, start) - radius * radius;
     float discriminant = b * b - 4.0 * a * c;
 
-    float intersect = false;
+    bool intersect = false;
     intersections = float2(0.0, 0.0);
 
     if (discriminant < 0.0 || a == 0.0)

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Sky/AtmosphericScattering/AtmosphericScattering.hlsl

         return float4(0.0, 0.0, 0.0, 0.0);
     }
 
-    return float4(fogColor, fogFactor); // Premultiplied alpha
+    return float4(fogColor, fogFactor);
-
 
 #endif