ShaderGraph Generates alot useless code

Code (CSharp):

1. SurfaceDescription SurfaceDescriptionFunction(SurfaceDescriptionInputs IN)
2.  {
3.       SurfaceDescription surface = (SurfaceDescription)0;
4.       float4 _SampleTexture2D_7F1DA238_RGBA_0 = SAMPLE_TEXTURE2D(Texture2D_5BF777A0, samplerTexture2D_5BF777A0, IN.uv0.xy);
5.       float _SampleTexture2D_7F1DA238_R_4 = _SampleTexture2D_7F1DA238_RGBA_0.r;
6.       float _SampleTexture2D_7F1DA238_G_5 = _SampleTexture2D_7F1DA238_RGBA_0.g;
7.       float _SampleTexture2D_7F1DA238_B_6 = _SampleTexture2D_7F1DA238_RGBA_0.b;
8.       float _SampleTexture2D_7F1DA238_A_7 = _SampleTexture2D_7F1DA238_RGBA_0.a;
9.       float _Split_4DEFA547_R_1 = _SampleTexture2D_7F1DA238_RGBA_0[0];
10.       float _Split_4DEFA547_G_2 = _SampleTexture2D_7F1DA238_RGBA_0[1];
11.       float _Split_4DEFA547_B_3 = _SampleTexture2D_7F1DA238_RGBA_0[2];
12.       float _Split_4DEFA547_A_4 = _SampleTexture2D_7F1DA238_RGBA_0[3];
13.      surface.Color = (_Split_4DEFA547_R_1.xxx);
14.      surface.Alpha = 1;
15.      surface.AlphaClipThreshold = 0;
16.      return surface;
17.  }

In a simple graph shaderGraph generates 7 unsed float variables
and i wish you add button for making shadow pass or not.
thanks.