removed extra --- lines

Author: StephenButtolph

README.md

@@ -9,8 +9,6 @@ a blockchains platform with high throughput, and blazing fast transactions.
 
 ## Installation
 
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 Avalanche is an incredibly lightweight protocol, so the minimum computer requirements are quite modest.
 
 - Hardware: 2 GHz or faster CPU, 4 GB RAM, 20 GB hard disk.
@@ -49,8 +47,6 @@ The Avalanche binary, named `avalanchego`, is in the `build` directory.
 
 ## Running Avalanche
 
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 ### Connecting to Mainnet
 
 To connect to the Avalanche Mainnet, run: