pgsql: Remove -o option to postmaster

Remove -o option to postmaster

This option was declared obsolete many years ago.

Reviewed-By: Tom Lane
Discussion: https://postgr.es/m/CABUevEyOE=9CQwZm2j=vwP5+6OLCSoxn9pBjK8gyRdkTzMfqtQ@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/d2e4bf688e16f95d180b68b7cbb7881b12434dba

Modified Files
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doc/src/sgml/ref/postgres-ref.sgml  | 26 ---------------
src/backend/main/main.c             |  1 -
src/backend/postmaster/postmaster.c | 66 +++----------------------------------
src/backend/tcop/postgres.c         |  6 +---
4 files changed, 6 insertions(+), 93 deletions(-)