refactor: remove outdated migration guide and glossary terms

Author: Le-Caignec

.vitepress/sidebar.ts

@@ -432,10 +432,6 @@ export function getSidebar() {
               },
             ],
           },
-          {
-            text: 'Migrate from v1 to v2',
-            link: '/references/dataProtector/migrate-from-v1',
-          },
         ],
       },
       {

src/references/dataProtector/migrate-from-v1.md

@@ -245,14 +245,6 @@ See [Deal](#deal) and [PoCo](#poco-proof-of-contribution) for more information.
 
 ## O
 
-### Oilers
-
-A term of affection used to designate the iExec community. Oilers are said to be
-holding "digital oil". This term could also be in reference to the iExec
-whitepaper that states: " iExec introduces a new paradigm in cloud computing: it
-will allow the trading of computing resources as commodities; in the same way
-markets may observe with resources such as oil, gold or rice."
-
 ### Oracle
 
 Data feeds that connect the off-chain world to blockchain products. Oracles act
@@ -424,14 +416,6 @@ special security measures that keep its contents completely private and secure.
 
 ## W
 
-### Whitepaper
-
-Explain the purpose and technology behind a project. Producing a whitepaper is a
-key step for a crypto startup to help investors understand technical information
-about its concept; whitepaper usually include a roadmap for how the project
-plans to grow and succeed. iExec's whitepaper is available at
-[iEx.ec/whitepaper](https://www.iex.ec/whitepaper)
-
 ### Workers
 
 Individuals or companies who own computing resources and are willing to make