refactor: avoid creating separate function for standard overloads

Author: MilesCranmer

src/EvaluateDerivative.jl

@@ -161,7 +161,6 @@ end
             )
         end
     end
-    # TODO: Need to add the case for many operators
 end
 
 """

src/OperatorEnumConstruction.jl

@@ -590,7 +590,7 @@ end
 
 # Predefine the most common operators so the errors
 # are more informative
-function _overload_common_operators()
+let
     # Overload the operators in batches (so that we don't hit the warning
     # about too many operators)
     operators = OperatorEnum((
@@ -604,8 +604,6 @@ function _overload_common_operators()
     @extend_operators(operators, empty_old_operators = true, internal = true)
 
     foreach(empty!, values(LATEST_OPERATOR_MAPPING))
-    return nothing
 end
-_overload_common_operators()
 
 end