movement: Remove unused `stop_at_soft_boundaries` parameter from `line_beginning` (#63245)
# Objective
remove the entire `stop_at_soft_boundaries` parameter from
`line_beginning`, since it was never used
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Release Notes:
- N/A
4ccbcabfeeHuaGu-Dragon committed on 8/26/2026, 2:28:43 PM· committed by GitHubparentfecc327