Revert "gen: add type name to comp for (#10881)"

Reason: 713a079 is more general and provides the same information.

This reverts commit dd3ee20566.

vlib/builtin/builtin.v

@@ -108,7 +108,6 @@ pub:
 	args        []MethodArgs
 	return_type int
 	typ         int
-	type_name   string
 }
 
 // FieldData holds information about a field. Fields reside on structs.
@@ -120,7 +119,6 @@ pub:
 	is_mut    bool
 	is_shared bool
 	typ       int
-	type_name string
 }
 
 enum AttributeKind {

vlib/v/gen/c/comptime.v

@@ -459,7 +459,6 @@ fn (mut g Gen) comp_for(node ast.CompFor) {
 			ret_typ := method.return_type.idx()
 			g.writeln('\t${node.val_var}.typ = $styp;')
 			g.writeln('\t${node.val_var}.return_type = $ret_typ;')
-			g.writeln('\t${node.val_var}.type_name = _SLIT("${g.table.get_type_symbol(ret_typ).name}");')
 			//
 			g.comptime_var_type_map['${node.val_var}.return_type'] = ret_typ
 			g.comptime_var_type_map['${node.val_var}.typ'] = styp
@@ -503,7 +502,6 @@ fn (mut g Gen) comp_for(node ast.CompFor) {
 				// g.writeln('\t${node.val_var}.typ = _SLIT("$field_sym.name");')
 				styp := field.typ
 				g.writeln('\t${node.val_var}.typ = $styp;')
-				g.writeln('\t${node.val_var}.type_name = _SLIT("${g.table.get_type_symbol(styp).name}");')
 				g.writeln('\t${node.val_var}.is_pub = $field.is_pub;')
 				g.writeln('\t${node.val_var}.is_mut = $field.is_mut;')
 				g.writeln('\t${node.val_var}.is_shared = ${field.typ.has_flag(.shared_f)};')

vlib/v/tests/comptime_for_test.v

@@ -68,7 +68,6 @@ fn test_comptime_for_fields() {
 	$for field in App.fields {
 		println('  field: $field.name | ' + no_lines('$field'))
 		$if field.typ is string {
-			assert field.type_name == 'string'
 			assert field.name in ['a', 'b', 'g']
 		}
 		$if field.typ is f32 {