patch 9.0.1952: Vim9: unused static field

Problem:  Vim9: unused static field
Solution: remove it and simplify code

closes: #13220

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>
diff --git a/src/vim9class.c b/src/vim9class.c
index 29ed6d1..885ac03 100644
--- a/src/vim9class.c
+++ b/src/vim9class.c
@@ -220,12 +220,10 @@
  * "cl" implementing that interface.
  */
     int
-object_index_from_itf_index(class_T *itf, int is_method, int idx, class_T *cl,
-								int is_static)
+object_index_from_itf_index(class_T *itf, int is_method, int idx, class_T *cl)
 {
     if (idx >= (is_method ? itf->class_obj_method_count
-				   : is_static ? itf->class_class_member_count
-						: itf->class_obj_member_count))
+				   : itf->class_obj_member_count))
     {
 	siemsg("index %d out of range for interface %s", idx, itf->class_name);
 	return 0;
@@ -255,9 +253,7 @@
 	if (searching && is_method)
 	    // The parent class methods are stored after the current class
 	    // methods.
-	    method_offset += is_static
-				? super->class_class_function_count_child
-				: super->class_obj_method_count_child;
+	    method_offset += super->class_obj_method_count_child;
     }
     if (i2c == NULL)
     {
@@ -265,26 +261,12 @@
 					      cl->class_name, itf->class_name);
 	return 0;
     }
-    if (is_static)
-    {
-	// TODO: Need a table for fast lookup?
-	char_u *name = itf->class_class_members[idx].ocm_name;
-	int	m_idx = class_member_idx(i2c->i2c_class, name, 0);
-	if (m_idx >= 0)
-	    return m_idx;
 
-	siemsg("class %s, interface %s, static %s not found",
-				      cl->class_name, itf->class_name, name);
-	return 0;
-    }
-    else
-    {
-	// A table follows the i2c for the class
-	int *table = (int *)(i2c + 1);
-	// "method_offset" is 0, if method is in the current class.  If method
-	// is in a parent class, then it is non-zero.
-	return table[idx] + method_offset;
-    }
+    // A table follows the i2c for the class
+    int *table = (int *)(i2c + 1);
+    // "method_offset" is 0, if method is in the current class.  If method
+    // is in a parent class, then it is non-zero.
+    return table[idx] + method_offset;
 }
 
 /*