Doc: de-document unimplemented geometric operators.

In commit 791090bd7, I made an effort to fill in documentation
for all geometric operators listed in pg_operator.  However,
it now appears that at least some of the omissions may have been
intentional, because some of those operator entries point at
unimplemented stub functions.  Remove those from the docs again.

(In HEAD, poly_distance stays, because c5c192d7b just added an
implementation for it.)

Per complaint from Anton Voloshin.

Discussion: https://postgr.es/m/3426566.1638832718@sss.pgh.pa.us

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 0a725a671177eb0233ef26461ef543c776a264d3..5801299b2778d6275856be884f1de7e2e9633b30 100644 (file)
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -10976,7 +10976,7 @@ CREATE TYPE rainbow AS ENUM ('red', 'orange', 'yellow', 'green', 'blue', 'purple
        </para>
        <para>
         Computes the center point.
-        Available for <type>box</type>, <type>lseg</type>, <type>path</type>,
+        Available for <type>box</type>, <type>lseg</type>,
         <type>polygon</type>, <type>circle</type>.
        </para>
        <para>
@@ -11042,8 +11042,6 @@ CREATE TYPE rainbow AS ENUM ('red', 'orange', 'yellow', 'green', 'blue', 'purple
         (<type>point</type>, <type>line</type>),
         (<type>lseg</type>, <type>box</type>),
         (<type>lseg</type>, <type>lseg</type>),
-        (<type>lseg</type>, <type>line</type>),
-        (<type>line</type>, <type>box</type>),
         (<type>line</type>, <type>lseg</type>).
        </para>
        <para>
@@ -11063,7 +11061,6 @@ CREATE TYPE rainbow AS ENUM ('red', 'orange', 'yellow', 'green', 'blue', 'purple
         of <type>point</type> with another geometric type, and for
         these additional pairs of types:
         (<type>box</type>, <type>lseg</type>),
-        (<type>box</type>, <type>line</type>),
         (<type>lseg</type>, <type>line</type>),
         (<type>polygon</type>, <type>circle</type>)
         (and the commutator cases).