{mach,examples,shaderexp}: fix default minimum window size

shaderexp/main.zig

@@ -24,13 +24,6 @@ last_mtime: i128,
 pub fn init(app: *App, core: *mach.Core) !void {
     timer = try std.time.Timer.start();
 
-    // On linux if we don't set a minimum size, you can squish the window to 0 pixels of width and height,
-    // this makes some strange effects when that happens, so it's better to leave a minimum size to avoid that,
-    // this doesn't prevent you from minimizing the window.
-    try core.setOptions(.{
-        .size_min = .{ .width = 20, .height = 20 },
-    });
-
     var fragment_file: std.fs.File = undefined;
     var last_mtime: i128 = undefined;