Remove unused parameters from self-join elimination functions

Remove root, from, and to from split_selfjoin_quals(), and root
from match_unique_clauses(). These parameters have been unused
since self-join elimination was committed.

Author: Tender Wang <[email protected]>
Reviewed-by: MiƂosz Bieniek <[email protected]>
Reviewed-by: Fujii Masao <[email protected]>
Discussion: 
https://postgr.es/m/cahewxnmwcfh5bk0anx8wrg8y_4c9jh8otkcenm1w6ijds3d...@mail.gmail.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/5681f0cfa5acfdc5146e2b74ff5b7e940df039f3

Modified Files
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src/backend/optimizer/plan/analyzejoins.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)

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