tools: fix ast_dump

Author: medvednikov

vlib/v2/ast_dump/ast_dump.v

@@ -655,11 +655,6 @@ fn (mut jb JsonBuilder) write_interface_decl(stmt ast.InterfaceDecl) {
 	jb.write_exprs(stmt.generic_params)
 	jb.sb.write_string(',\n')
 
-	jb.write_indent()
-	jb.sb.write_string('"implements": ')
-	jb.write_exprs(stmt.implements)
-	jb.sb.write_string(',\n')
-
 	jb.write_indent()
 	jb.sb.write_string('"embedded": ')
 	jb.write_exprs(stmt.embedded)