Revert "[SE-3381] Allows adding new tinymce plugins through platform configuration"

[nizarmah]

Reverts #295

The reason behind the revert is that with multiple app servers, the TinyMCE object in the JavaScript code doesn't get sorted by key. This is a huge problem because the changes being upstreamed are already being sorted by key...

So it seems like there's a specific backport that is missing, which should be done before merging this change.

Here's what I'm talking about:

• File 1:

                           var d = {
                              TINYMCE_ADDITIONAL_PLUGINS: [{
                                 toolbar: !0,
                                 extra_settings: {
                                    linktypes: ["download", "offer"],
                                    orientations: ["Vertical", "Horizontal"],
                                    filetypes: ["PDF", "zip", "Video", "Design"],
                                    styles: ["Primary", "Normal", "Secondary"]
                                 },
                                 name: "adsklink"
                              }]
                           }.TINYMCE_ADDITIONAL_PLUGINS;

• File 2:

                           var d = {
                              TINYMCE_ADDITIONAL_PLUGINS: [{
                                 toolbar: !0,
                                 name: "adsklink",
                                 extra_settings: {
                                    linktypes: ["download", "offer"],
                                    orientations: ["Vertical", "Horizontal"],
                                    filetypes: ["PDF", "zip", "Video", "Design"],
                                    styles: ["Primary", "Normal", "Secondary"]
                                 }
                              }]
                           }.TINYMCE_ADDITIONAL_PLUGINS;