Removed Tex2DLinear function which was causing a dependent texture read due to parameter copy.

Assets/ScriptableRenderPipeline/LightweightPipeline/Shaders/LightweightPipeline.shader

 
             half4 frag(v2f i) : SV_Target
             {
-                half4 diffuseAlpha = Tex2DLinearRGBA(_MainTex, i.uv01.xy);
-                half3 diffuse = diffuseAlpha.rgb * _Color.rgb;
+                half4 diffuseAlpha = tex2D(_MainTex, i.uv01.xy);
+                half3 diffuse = LIGHTWEIGHT_GAMMA_TO_LINEAR(diffuseAlpha.rgb) * _Color.rgb;
                 half alpha = diffuseAlpha.a * _Color.a;
 
                 // Keep for compatibility reasons. Shader Inpector throws a warning when using cutoff
 
 #endif // SINGLE_DIRECTIONAL_LIGHT
 
-                Emission(i.uv01.xy, color);
+#ifdef _EMISSION
+                color += LIGHTWEIGHT_GAMMA_TO_LINEAR(tex2D(_EmissionMap, i.uv01.xy).rgb) * _EmissionColor;
+#else
+                color += _EmissionColor;
+#endif
 
 #if defined(LIGHTMAP_ON)
                 color += (DecodeLightmap(UNITY_SAMPLE_TEX2D(unity_Lightmap, i.uv01.zw)) + i.fogCoord.yzw) * diffuse;
                 SpecularGloss(i.uv.xy, 1.0, specularColor);
                 o.SpecularColor = specularColor;
 
-                Emission(i.uv.xy, o.Emission);
+#ifdef _EMISSION
+                o.Emission += LIGHTWEIGHT_GAMMA_TO_LINEAR(tex2D(_EmissionMap, i.uv).rgb) * _EmissionColor;
+#else
+                o.Emission += _EmissionColor;
+#endif
 
                 return UnityMetaFragment(o);
             }

Assets/ScriptableRenderPipeline/LightweightPipeline/Shaders/LightweightPipelineCore.cginc

 #include "LightweightPipelineShadows.cginc"
 #endif
 
-inline half3 Tex2DLinearRGB(sampler2D s, half2 uv)
-{
-    return LIGHTWEIGHT_GAMMA_TO_LINEAR(tex2D(s, uv).rgb);
-}
-
-inline half4 Tex2DLinearRGBA(sampler2D s, half2 uv)
-{
-    half4 color = tex2D(s, uv);
-    return half4(LIGHTWEIGHT_GAMMA_TO_LINEAR(color.rgb), color.a);
-}
-
 inline void NormalMap(v2f i, out half3 normal)
 {
 #if _NORMALMAP
     specularGloss.a = alpha;
 #else
     specularGloss = _SpecColor;
-#endif
-}
-
-inline void Emission(half2 uv, inout half3 color)
-{
-#ifdef _EMISSION
-    color += Tex2DLinearRGB(_EmissionMap, uv) * _EmissionColor;
-#else
-    color += _EmissionColor;
 #endif
 }