Removed "Trading 212 is recognised natively and other formats (IBKR,
Fidelity, Schwab…) are auto-detected" from the import section's
lede paragraph — internal/marketing noise that doesn't help the user
once they're already on the import screen with a file picker in
front of them. Kept the surrounding sentence ("Drop a portfolio CSV
from any broker. We'll parse it…") and the T212 export-path hint
since the latter is concrete instructional content for T212 users.