[LWRP] 'ShaderIncludePathAttribute' is obsolete: '[ShaderIncludePath] attribute is no longer supported' error in the Console once the 4.0.1 packagage is installed

Steps to reproduce:

1) Open Unity and create a new project
2) Go to Window >> Package Manager >> Install LWRP 4.0.1 package
3) Observe this error in the Console:
Library\PackageCache\com.unity.shadergraph@4.0.1-preview\Editor\DefaultShaderIncludes.cs(24,10): error CS0619: 'ShaderIncludePathAttribute' is obsolete: '[ShaderIncludePath] attribute is no longer supported. Your shader library must be under the Assets folder or in a package. To include shader headers directly from a package, use #include "Packages/<package name>/<path to your header file>"'

Expected result: No error

Reproduced with:
2019.1.0a5

Not reproduced with:
2018.3.0b6, 2019.1.0a4

Regression since:
2019.1.0a5