ast: remove redundant `import v.ast`

vlib/v/ast/init.v

@@ -1,7 +1,5 @@
 module ast
 
-import v.ast
-
 pub fn resolve_init(node StructInit, typ Type, t &Table) Expr {
 	type_sym := t.get_type_symbol(typ)
 	if type_sym.kind == .array {
@@ -32,7 +30,7 @@ pub fn resolve_init(node StructInit, typ Type, t &Table) Expr {
 				}
 			}
 		}
-		return ast.ArrayInit{
+		return ArrayInit{
 			// TODO: mod is not being set for now, we could need this in future
 			// mod: mod
 			pos: node.pos
@@ -51,12 +49,12 @@ pub fn resolve_init(node StructInit, typ Type, t &Table) Expr {
 		mut keys := []Expr{}
 		mut vals := []Expr{}
 		for field in node.fields {
-			keys << ast.StringLiteral{
+			keys << StringLiteral{
 				val: field.name
 			}
 			vals << field.expr
 		}
-		return ast.MapInit{
+		return MapInit{
 			typ: typ
 			key_type: map_info.key_type
 			value_type: map_info.value_type
@@ -65,7 +63,7 @@ pub fn resolve_init(node StructInit, typ Type, t &Table) Expr {
 		}
 	}
 	// struct / other (sumtype?)
-	return ast.StructInit{
+	return StructInit{
 		...node
 		unresolved: false
 	}

vlib/v/ast/scope.v

@@ -3,8 +3,6 @@
 // that can be found in the LICENSE file.
 module ast
 
-import v.ast
-
 pub struct Scope {
 pub mut:
 	// mut:
@@ -18,7 +16,7 @@ pub mut:
 }
 
 pub fn new_scope(parent &Scope, start_pos int) &Scope {
-	return &ast.Scope{
+	return &Scope{
 		parent: parent
 		start_pos: start_pos
 	}

vlib/v/ast/str.v

@@ -3,7 +3,6 @@
 // that can be found in the LICENSE file.
 module ast
 
-import v.ast
 import v.util
 import strings
 
@@ -117,7 +116,7 @@ pub fn (node &FnDecl) stringify(t &Table, cur_mod string, m2a map[string]string)
 		}
 	}
 	f.write_string(')')
-	if node.return_type != ast.void_type {
+	if node.return_type != void_type {
 		mut rs := util.no_cur_mod(t.type_to_str(node.return_type), cur_mod)
 		for mod, alias in m2a {
 			rs = rs.replace(mod, alias)