Update README.mdx

I think, according to Styleguyide, this "intro" page should be eliminated. In any case, if we want to keep it, it should be minimal

docs/mevblocker/builders/README.mdx

@@ -1,5 +1,3 @@
 # Builders
 
-MEV Blocker was created to allow anyone to safely use Ethereum, guaranteeing fast inclusion time, protection from attacks, and providing rebates whenever there are profitable backrunning opportunities. Achieving these ambitious objectives requires a source of revenue to support the technical development of the product and to drive continuous growth in users' adoption. Furthermore, MEV Blocker wants to be an open, shared infrastructure. As part of this effort, it is important to have clear and transparent rules determining which builders can receive its flow.
-
-The purpose of this document is to spell out the rules that builders should follow. One of these rules is that builders should pay a fee. This section also explains the fee mechanism and its rationale.
+Builders receiving MEV blocker transactions should adhere to a few rules and also pay a fee to MEV blocker. The proceeds of the fee are used to support MEV blocker technical development and drive continuous growth in users' adoption.