textproc/py-python-lsp-jsonrpc: Remove run_depends

It turned out that some runtime dependencies are not necessary. These
were probably relics from the search for necessary dependencies for the
test target. Thanks to John Hein for the hint.

PR: 274906
MFH: 2023Q4
(cherry picked from commit a721b47305eac2d636edea8102581fa9d9cc10c8)