fix(rpn): consolidate extractVarName into rpn_parse.go (task 6k)

1 files changed, 0 insertions, 14 deletions

diff --git a/internal/rpn/operations_variables.go b/internal/rpn/operations_variables.go
index 9f60133..d1b07eb 100644
--- a/internal/rpn/operations_variables.go
+++ b/internal/rpn/operations_variables.go
@@ -97,20 +97,6 @@ func (o *Operations) ClearVariables() {
 	o.vars.ClearVariables()
 }
 
-// extractVarName extracts a variable name from a StackValue.
-// Symbols use their internal name, StringNums use their string value,
-// and all other types fall back to String().
-func extractVarName(val StackValue) string {
-	switch v := val.(type) {
-	case *Symbol:
-		return v.Name()
-	case *StringNum:
-		return v.String()
-	default:
-		return val.String()
-	}
-}
-
 // AssignLeft assigns a value to a variable (for =: operator).
 // Stack order: value name =: (value on bottom, name on top).
 // This function pops name first (top of stack), then value.