Remove TupleDesc remapping logic from tqueue.c.

With the introduction of a shared memory record typmod registry, it is no
longer necessary to remap record typmods when sending tuples between backends
so most of tqueue.c can be removed.

Author: Thomas Munro
Reviewed-By: Andres Freund
Discussion: 
https://postgr.es/m/CAEepm=0ZtQ-SpsgCyzzYpsXS6e=kzwqk3g5ygn3mdv7a8da...@mail.gmail.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/6b65a7fe62e129d5c2b85cd74d6a91d8f7564608

Modified Files
--------------
src/backend/executor/execParallel.c    |    7 +-
src/backend/executor/nodeGather.c      |    3 +-
src/backend/executor/nodeGatherMerge.c |    2 +-
src/backend/executor/tqueue.c          | 1119 +-------------------------------
src/include/executor/execParallel.h    |    3 +-
src/include/executor/tqueue.h          |    3 +-
6 files changed, 27 insertions(+), 1110 deletions(-)


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