Clean up init function

Author: MilesCranmer

src/DynamicExpressions.jl

@@ -37,13 +37,11 @@ using Reexport
 @reexport import .EvaluationHelpersModule
 @reexport import .ExtensionInterfaceModule: node_to_symbolic, symbolic_to_node
 
-function __init__()
-    #! format: off
-    @static if !isdefined(Base, :get_extension)
-        @require SymbolicUtils = "d1185830-fcd6-423d-90d6-eec64667417b" include("../ext/DynamicExpressionsSymbolicUtilsExt.jl")
-    end
-    #! format: on
+#! format: off
+if !isdefined(Base, :get_extension)
+    @init @require SymbolicUtils = "d1185830-fcd6-423d-90d6-eec64667417b" include("../ext/DynamicExpressionsSymbolicUtilsExt.jl")
 end
+#! format: on
 
 include("deprecated.jl")