Refactorice Func is never called

This will allow it to be silenced.

Author: boriel

src/api/errmsg.py

@@ -171,6 +171,11 @@ def warning_fastcall_with_N_parameters(lineno: int, kind: str, id_: str, num_par
     """
     warning(lineno, f"{kind} '{id_}' declared as FASTCALL with {num_params} parameters")
 
+
+@register_warning('170')
+def warning_func_is_never_called(lineno: int, func_name: str, fname: Optional[str] = None):
+    warning(lineno, f"Function '{func_name}' is never called and has been ignored", fname=fname)
+
 # endregion
 
 # region [Syntax Errors]

src/api/optimize.py

@@ -13,7 +13,8 @@
 
 from src import symbols
 from src.ast import NodeVisitor
-from src.api.errmsg import warning
+from src.api import errmsg
+
 from src.api.constants import TYPE, SCOPE, CLASS
 from src.api.debug import __DEBUG__
 from src.api.errmsg import warning_not_used
@@ -144,8 +145,7 @@ def visit_CALL(self, node):
 
     def visit_FUNCDECL(self, node):
         if self.O_LEVEL > 1 and not node.entry.accessed:
-            warning(node.entry.lineno, "Function '%s' is never called and has been ignored" % node.entry.name,
-                    fname=node.entry.filename)
+            errmsg.warning_func_is_never_called(node.entry.lineno, node.entry.name, fname=node.entry.filename)
             yield self.NOP
         else:
             node.children[1] = (yield ToVisit(node.entry))
@@ -174,7 +174,7 @@ def visit_LET(self, node):
 
     def visit_LETSUBSTR(self, node):
         if self.O_LEVEL > 1 and not node.children[0].accessed:
-            warning_not_used(node.children[0].lineno, node.children[0].name)
+            errmsg.warning_not_used(node.children[0].lineno, node.children[0].name)
             yield self.NOP
         else:
             yield (yield self.generic_visit(node))