chrome.yaml contains some whitespace-only lines

[phrohdoh]

Detected by an experimental version of oraide on 43f28ea094935e39ed9187330fb841c509cde138:

note: whitespace-only line probably not desired
    ┌─ ra2/mods/ra2/chrome.yaml:381:1
    │
381 │  
    │ ^
    │
    = "␣"

note: whitespace-only line probably not desired
    ┌─ ra2/mods/ra2/chrome.yaml:762:1
    │
762 │     
    │ ^^^^
    │
    = "␣␣␣␣"

note: whitespace-only line probably not desired
     ┌─ ra2/mods/ra2/chrome.yaml:1037:1
     │
1037 │   
     │ ^^
     │
     = "␣␣"

https://github.com/OpenRA/ra2/blob/43f28ea094935e39ed9187330fb841c509cde138/mods/ra2/chrome.yaml#L381 https://github.com/OpenRA/ra2/blob/43f28ea094935e39ed9187330fb841c509cde138/mods/ra2/chrome.yaml#L762 https://github.com/OpenRA/ra2/blob/43f28ea094935e39ed9187330fb841c509cde138/mods/ra2/chrome.yaml#1037