[TSE-4788] Remove clipboard snippet as it is wrong - #62

Changed pages include:

• index.html - view
• en/index.html - view
• 404.html - view
• ja/index.html - view
• getting_started/index.html - view
• snippets/index.html - view
• ja/snippets/index.html - view
• ja/getting_started/index.html - view
• snippets/assertions/index.html - view
• snippets/values/index.html - view

There are more changes not included in the list