pgsql: Remove configure --disable-float4-byval

Remove configure --disable-float4-byval

This build option was only useful to maintain compatibility for
version-0 functions, but those are no longer supported, so this option
can be removed.

float4 is now always pass-by-value; the pass-by-reference code path is
completely removed.

Discussion: https://www.postgresql.org/message-id/flat/f3e1e576-2749-bbd7-2d57-3f9dcf75255a(at)2ndquadrant(dot)com

Branch
------
master

Details
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https://git.postgresql.org/pg/commitdiff/2e4db241bfd3206bad8286f8ffc2db6bbdaefcdf

Modified Files
--------------
configure | 42 ---------------------------------
configure.in | 10 --------
doc/src/sgml/func.sgml | 5 ----
doc/src/sgml/installation.sgml | 12 ----------
src/backend/access/index/indexam.c | 5 ----
src/backend/access/transam/xlog.c | 17 -------------
src/backend/bootstrap/bootstrap.c | 2 +-
src/backend/catalog/genbki.pl | 2 +-
src/backend/commands/analyze.c | 2 +-
src/backend/utils/fmgr/dfmgr.c | 9 -------
src/backend/utils/fmgr/fmgr.c | 19 ++-------------
src/backend/utils/misc/pg_controldata.c | 17 +++++--------
src/bin/initdb/initdb.c | 3 ---
src/bin/pg_controldata/pg_controldata.c | 2 --
src/bin/pg_resetwal/pg_resetwal.c | 3 ---
src/include/catalog/catversion.h | 2 +-
src/include/catalog/pg_control.h | 4 +---
src/include/catalog/pg_proc.dat | 6 ++---
src/include/catalog/pg_type.dat | 2 +-
src/include/fmgr.h | 2 --
src/include/pg_config.h.in | 7 ------
src/include/postgres.h | 23 +-----------------
src/tools/msvc/Solution.pm | 11 ---------
src/tools/msvc/config_default.pl | 1 -
24 files changed, 18 insertions(+), 190 deletions(-)