deprecate SymbolicUtils dependency

Author: jverzani

Project.toml

@@ -12,26 +12,26 @@ SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
 SymEngine_jll = "3428059b-622b-5399-b16f-d347a77089a4"
 
 [weakdeps]
-SymbolicUtils = "d1185830-fcd6-423d-90d6-eec64667417b"
+#SymbolicUtils = "d1185830-fcd6-423d-90d6-eec64667417b"
 TermInterface = "8ea1fca8-c5ef-4a55-8b96-4e9afe9c9a3c"
 
 [extensions]
-SymEngineSymbolicUtilsExt = "SymbolicUtils"
+#SymEngineSymbolicUtilsExt = "SymbolicUtils"
 SymEngineTermInterfaceExt = "TermInterface"
 
 [compat]
 Compat = "0.63.0, 1, 2, 3, 4"
 RecipesBase = "0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 1.0"
 SpecialFunctions = "0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 0.10, 1, 2"
 SymEngine_jll = "0.9, 0.10, 0.11, 0.12"
-SymbolicUtils = "3"
+#SymbolicUtils = "3"
 TermInterface = "2"
 julia = "1.6"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
-SymbolicUtils = "d1185830-fcd6-423d-90d6-eec64667417b"
+#SymbolicUtils = "d1185830-fcd6-423d-90d6-eec64667417b"
 TermInterface = "8ea1fca8-c5ef-4a55-8b96-4e9afe9c9a3c"
 
 [targets]
-test = ["SymbolicUtils", "TermInterface", "Test"]
+test = ["TermInterface", "Test"]

test/test-SymbolicUtils.jl

@@ -1,6 +1,5 @@
 using Test
 using SymEngine
-import SymbolicUtils: simplify, @rule, @acrule, Chain, Fixpoint
 
 import TermInterface
 @testset "TermInterface" begin
@@ -11,6 +10,8 @@ import TermInterface
     @test TermInterface.arguments(sin(x)) == [x]
 end
 
+#=
+import SymbolicUtils: simplify, @rule, @acrule, Chain, Fixpoint
 @testset "SymbolicUtils" begin
     # from SymbolicUtils.jl docs
     # https://symbolicutils.juliasymbolics.org/rewrite/#rule-based_rewriting
@@ -60,3 +61,4 @@ end
     @test Fixpoint(cas)((cos(x) + sin(x))^2) == 1 + 2cos(x)*sin(x)
 
 end
+=#