Remove LambertW

It was only a dependency for a symbolic solver that no longer exists. It can be added back as an extension for the new solver sometime in the future.

Project.toml

@@ -18,7 +18,6 @@ DynamicPolynomials = "7c1d4256-1411-5781-91ec-d7bc3513ac07"
 ForwardDiff = "f6369f11-7733-5829-9624-2563aa707210"
 IfElse = "615f187c-cbe4-4ef1-ba3b-2fcf58d6d173"
 LaTeXStrings = "b964fa9f-0449-5b57-a5c2-d3ea65f4040f"
-LambertW = "984bce1d-4616-540c-a9ee-88d1112d94c9"
 Latexify = "23fbe1c1-3f47-55db-b15f-69d7ec21a316"
 Libdl = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
@@ -73,7 +72,6 @@ ForwardDiff = "0.10.36"
 Groebner = "0.5, 0.6, 0.7"
 IfElse = "0.1"
 LaTeXStrings = "1.3"
-LambertW = "0.4.5"
 Latexify = "0.16"
 LogExpFunctions = "0.3"
 Lux = "1"