The breakpoint check in Jit.cpp makes it redundant.
Normally this redundant check doesn't cause any issues, but if you
create a breakpoint and enable logging without breaking, you get two
log messages if the breakpoint is at the beginning of a block. See
https://bugs.dolphin-emu.org/issues/13044.
This is also a tiny performance improvement for when debugging is
active, since we no longer check for breakpoints for blocks that never
had any breakpoints to begin with.
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