Cleanup Instancing

Get rid of compound matrices and remove direct reference to SHADERPASS

ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/UnityInstancing.hlsl

             unity_InstanceID = inputInstanceID + unity_BaseInstanceID;
         #endif
     }
-    void UnitySetupCompoundMatrices();
+
-            #define DEFAULT_UNITY_SETUP_INSTANCE_ID(input)      { UnitySetupInstanceID(UNITY_GET_INSTANCE_ID(input)); UNITY_INSTANCING_PROCEDURAL_FUNC(); UnitySetupCompoundMatrices(); }
+            #define DEFAULT_UNITY_SETUP_INSTANCE_ID(input)      { UnitySetupInstanceID(UNITY_GET_INSTANCE_ID(input)); UNITY_INSTANCING_PROCEDURAL_FUNC();}
-        #define DEFAULT_UNITY_SETUP_INSTANCE_ID(input)          { UnitySetupInstanceID(UNITY_GET_INSTANCE_ID(input)); UnitySetupCompoundMatrices(); }
+        #define DEFAULT_UNITY_SETUP_INSTANCE_ID(input)          { UnitySetupInstanceID(UNITY_GET_INSTANCE_ID(input));}
     #endif
     #define UNITY_TRANSFER_INSTANCE_ID(input, output)   output.instanceID = UNITY_GET_INSTANCE_ID(input)
 #else
         #if !defined(DYNAMICLIGHTMAP_ON) 
             #define UNITY_USE_SHCOEFFS_ARRAYS
         #endif
-        #if (SHADERPASS == SHADERPASS_GBUFFER) && defined(SHADOWS_SHADOWMASK)
+        #if defined(SHADOWS_SHADOWMASK)
             #define UNITY_USE_PROBESOCCLUSION_ARRAY
         #endif
     #endif
     #define UNITY_ACCESS_INSTANCED_PROP(arr, var)           var
 
 #endif // UNITY_INSTANCING_ENABLED
-
-#if defined(UNITY_INSTANCING_ENABLED) || defined(UNITY_PROCEDURAL_INSTANCING_ENABLED) || defined(UNITY_STEREO_INSTANCING_ENABLED)
-    // The following matrix evaluations depend on the static var unity_InstanceID & unity_StereoEyeIndex. They need to be initialized after UnitySetupInstanceID.
-    static float4x4 unity_MatrixMVP_Instanced;
-    static float4x4 unity_MatrixMV_Instanced;
-    static float4x4 unity_MatrixTMV_Instanced;
-    static float4x4 unity_MatrixITMV_Instanced;
-    void UnitySetupCompoundMatrices()
-    {
-        unity_MatrixMVP_Instanced = mul(UNITY_MATRIX_VP, UNITY_MATRIX_M);
-        unity_MatrixMV_Instanced = mul(UNITY_MATRIX_V, UNITY_MATRIX_M);
-        unity_MatrixTMV_Instanced = transpose(unity_MatrixMV_Instanced);
-        unity_MatrixITMV_Instanced = transpose(mul(UNITY_MATRIX_I_M, unity_MatrixInvV));
-    }
-    #undef UNITY_MATRIX_MVP
-    #undef UNITY_MATRIX_MV
-    #undef UNITY_MATRIX_T_MV
-    #undef UNITY_MATRIX_IT_MV
-    #define UNITY_MATRIX_MVP    unity_MatrixMVP_Instanced
-    #define UNITY_MATRIX_MV     unity_MatrixMV_Instanced
-    #define UNITY_MATRIX_T_MV   unity_MatrixTMV_Instanced
-    #define UNITY_MATRIX_IT_MV  unity_MatrixITMV_Instanced
-#endif
 
 #endif // UNITY_INSTANCING_INCLUDED