userctx: remove getter, allow multiple set

Author: krichprollsch

src/engines/v8/v8.zig

@@ -136,17 +136,9 @@ pub const Env = struct {
     }
 
     pub fn setUserContext(self: *Env, userctx: public.UserContext) anyerror!void {
-        // you can't replace a user context defined in init.
-        if (self.nat_ctx.userctx != null) return error.UserContextExists;
-
         self.nat_ctx.userctx = userctx;
     }
 
-    pub fn getUserContext(self: *Env) ?*public.UserContext {
-        if (self.nat_ctx.userctx) |*ctx| return ctx;
-        return null;
-    }
-
     // load user-defined Types into Javascript environement
     pub fn load(self: Env, js_types: []usize) anyerror!void {
         var tpls: [gen.Types.len]TPL = undefined;

src/interfaces.zig

@@ -55,8 +55,6 @@ pub fn Env(
         userctx: public.UserContext,
     ) anyerror!void);
 
-    assertDecl(T, "getUserContext", fn (self: *T) ?*public.UserContext);
-
     // start()
     assertDecl(T, "start", fn (
         self: *T,