Removed _METALLIC_SETUP dependency. Now if _SPECULAR_SETUP is not defined MetallicSetup is used.

ScriptableRenderPipeline/LightweightPipeline/Editor/ShaderGUI/LightweightStandardGUI.cs

                 hasGlossMap = material.GetTexture("_MetallicGlossMap");
 
             LightweightShaderHelper.SetKeyword(material, "_SPECULAR_SETUP", isSpecularWorkFlow);
-            LightweightShaderHelper.SetKeyword(material, "_METALLIC_SETUP", !isSpecularWorkFlow);
 
             LightweightShaderHelper.SetKeyword(material, "_METALLICSPECGLOSSMAP", hasGlossMap);
             LightweightShaderHelper.SetKeyword(material, "_SPECGLOSSMAP", hasGlossMap && isSpecularWorkFlow);

ScriptableRenderPipeline/LightweightPipeline/Shaders/LightweightPassLit.cginc

     half4 specGloss = MetallicSpecGloss(uv, albedoAlpha);
     outSurfaceData.albedo = LIGHTWEIGHT_GAMMA_TO_LINEAR(albedoAlpha.rgb) * _Color.rgb;
 
-#if _METALLIC_SETUP
-    outSurfaceData.metallic = specGloss.r;
-    outSurfaceData.specular = half3(0.0h, 0.0h, 0.0h);
-#else
+#if _SPECULAR_SETUP
+#else
+    outSurfaceData.metallic = specGloss.r;
+    outSurfaceData.specular = half3(0.0h, 0.0h, 0.0h);
 #endif
 
     outSurfaceData.smoothness = specGloss.a;

ScriptableRenderPipeline/LightweightPipeline/Shaders/LightweightStandard.shader

             #pragma target 3.0
 
             // -------------------------------------
-            #pragma shader_feature _METALLIC_SETUP _SPECULAR_SETUP
+            #pragma shader_feature _OCCLUSIONMAP
+
-            #pragma shader_feature _OCCLUSIONMAP
+            #pragma shader_feature _SPECULAR_SETUP
 
             #pragma multi_compile _MAIN_DIRECTIONAL_LIGHT _MAIN_SPOT_LIGHT _MAIN_POINT_LIGHT
             #pragma multi_compile _ _ADDITIONAL_LIGHTS