Remove set-but-not-used variable.

In branches before 9.3, commit 8703059c6 caused join_is_legal()'s
unique_ified variable to become unused, since its only remaining
use is for LATERAL-related tests which don't exist pre-9.3.
My compiler didn't complain about that, but Peter's does.

diff --git a/src/backend/optimizer/path/joinrels.c b/src/backend/optimizer/path/joinrels.c
index 3666bf43910aaff81f4c2563c03e2911fd04e716..fab8fd236a81eab6be2ba040cc72eb79cd59b720 100644 (file)
--- a/src/backend/optimizer/path/joinrels.c
+++ b/src/backend/optimizer/path/joinrels.c
@@ -324,7 +324,6 @@ join_is_legal(PlannerInfo *root, RelOptInfo *rel1, RelOptInfo *rel2,
 {
        SpecialJoinInfo *match_sjinfo;
        bool            reversed;
-       bool            unique_ified;
        bool            must_be_leftjoin;
        ListCell   *l;
 
@@ -342,7 +341,6 @@ join_is_legal(PlannerInfo *root, RelOptInfo *rel1, RelOptInfo *rel2,
         */
        match_sjinfo = NULL;
        reversed = false;
-       unique_ified = false;
        must_be_leftjoin = false;
 
        foreach(l, root->join_info_list)
@@ -444,7 +442,6 @@ join_is_legal(PlannerInfo *root, RelOptInfo *rel1, RelOptInfo *rel2,
                                return false;   /* invalid join path */
                        match_sjinfo = sjinfo;
                        reversed = false;
-                       unique_ified = true;
                }
                else if (sjinfo->jointype == JOIN_SEMI &&
                                 bms_equal(sjinfo->syn_righthand, rel1->relids) &&
@@ -456,7 +453,6 @@ join_is_legal(PlannerInfo *root, RelOptInfo *rel1, RelOptInfo *rel2,
                                return false;   /* invalid join path */
                        match_sjinfo = sjinfo;
                        reversed = true;
-                       unique_ified = true;
                }
                else
                {