Remove mongoproxy branch checkout

Author: prestonvasquez

.evergreen/setup-system.sh

@@ -47,8 +47,7 @@ fi
 
 # Ensure a checkout of drivers-tools.
 if [ ! -d "$DRIVERS_TOOLS" ]; then
-  #git clone https://github.com/mongodb-labs/drivers-evergreen-tools $DRIVERS_TOOLS
-  git clone -b DRIVERS-2884-mongoproxy https://github.com/prestonvasquez/drivers-evergreen-tools $DRIVERS_TOOLS
+  git clone https://github.com/mongodb-labs/drivers-evergreen-tools $DRIVERS_TOOLS
 fi
 
 # Write the .env file for drivers-tools.