Removed Double space

Author: DocMonster7

boards.txt

@@ -23343,7 +23343,6 @@ nebulas3.menu.FlashSize.8M.build.partitions=default_8MB
 nebulas3.menu.FlashSize.16M=16MB (128Mb)
 nebulas3.menu.FlashSize.16M.build.flash_size=16MB
 
-
 nebulas3.menu.LoopCore.1=Core 1
 nebulas3.menu.LoopCore.1.build.loop_core=-DARDUINO_RUNNING_CORE=1
 nebulas3.menu.LoopCore.0=Core 0