remove unused js.This

src/browser/js/Caller.zig

@@ -377,24 +377,6 @@ fn getArgs(self: *const Caller, comptime F: type, comptime offset: usize, info:
             break :blk params[0 .. params.len - 1];
         }
 
-        // If the last parameter is a special JsThis, set it, and exclude it
-        // from our params slice, because we don't want to bind it to
-        // a JS argument
-        if (comptime params[params.len - 1].type.? == js.This) {
-            @field(args, tupleFieldName(params.len - 1 + offset)) = .{ .obj = .{
-                .context = context,
-                .js_obj = info.getThis(),
-            } };
-
-            // AND the 2nd last parameter is state
-            if (params.len > 1 and comptime isPage(params[params.len - 2].type.?)) {
-                @field(args, tupleFieldName(params.len - 2 + offset)) = self.context.page;
-                break :blk params[0 .. params.len - 2];
-            }
-
-            break :blk params[0 .. params.len - 1];
-        }
-
         // we have neither a Page nor a JsObject. All params must be
         // bound to a JavaScript value.
         break :blk params;
@@ -446,8 +428,6 @@ fn getArgs(self: *const Caller, comptime F: type, comptime offset: usize, info:
 
         if (comptime isPage(param.type.?)) {
             @compileError("Page must be the last parameter (or 2nd last if there's a JsThis): " ++ @typeName(F));
-        } else if (comptime param.type.? == js.This) {
-            @compileError("JsThis must be the last parameter: " ++ @typeName(F));
         } else if (i >= js_parameter_count) {
             if (@typeInfo(param.type.?) != .optional) {
                 return error.InvalidArgument;

src/browser/js/This.zig

@@ -1,40 +0,0 @@
-// Copyright (C) 2023-2025  Lightpanda (Selecy SAS)
-//
-// Francis Bouvier <francis@lightpanda.io>
-// Pierre Tachoire <pierre@lightpanda.io>
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as
-// published by the Free Software Foundation, either version 3 of the
-// License, or (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
-//
-// You should have received a copy of the GNU Affero General Public License
-// along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-const std = @import("std");
-const js = @import("js.zig");
-
-// This only exists so that we know whether a function wants the opaque
-// JS argument (js.Object), or if it wants the receiver as an opaque
-// value.
-// js.Object is normally used when a method wants an opaque JS object
-// that it'll pass into a callback.
-// This is used when the function wants to do advanced manipulation
-// of the v8.Object bound to the instance. For example, postAttach is an
-// example of using This.
-
-const This = @This();
-obj: js.Object,
-
-pub fn setIndex(self: This, index: u32, value: anytype, opts: js.Object.SetOpts) !void {
-    return self.obj.setIndex(index, value, opts);
-}
-
-pub fn set(self: This, key: []const u8, value: anytype, opts: js.Object.SetOpts) !void {
-    return self.obj.set(key, value, opts);
-}

src/browser/js/js.zig

@@ -29,8 +29,6 @@ pub const Inspector = @import("Inspector.zig");
 pub const Snapshot = @import("Snapshot.zig");
 pub const Platform = @import("Platform.zig");
 
-// TODO: Is "This" really necessary?
-pub const This = @import("This.zig");
 pub const Value = @import("Value.zig");
 pub const Array = @import("Array.zig");
 pub const String = @import("String.zig");