The Python hash verification in start_bambuddy.bat used a multi-line
`for /f "usebackq"` with a backtick-delimited command split across
lines. Windows CMD cannot parse line breaks inside backtick-delimited
for /f commands, causing "The syntax of the command is incorrect" at
step 1/6. Removed the entire redundant verification block — the
verify_sha256 subroutine already checks the archive against the
pinned hash. The removed block also had a secondary bug: it always
downloaded the amd64 checksum from python.org even on arm64 systems.