bugfix: removing dangling coma

SVN: 23611

screening/source/sql/imaging/postgresql/018/schema-018.sql

@@ -231,7 +231,7 @@ CREATE TABLE ACQUIRED_IMAGES (
     CONSTRAINT FK_IMAGES_1 FOREIGN KEY (CHANNEL_STACK_ID) REFERENCES CHANNEL_STACKS (ID) ON DELETE CASCADE ON UPDATE CASCADE,
     CONSTRAINT FK_IMAGES_2 FOREIGN KEY (CHANNEL_ID) REFERENCES CHANNELS (ID) ON DELETE CASCADE ON UPDATE CASCADE,
     CONSTRAINT FK_IMAGES_3 FOREIGN KEY (IMG_ID) REFERENCES IMAGES (ID) ON DELETE SET NULL ON UPDATE CASCADE,
-    CONSTRAINT FK_IMAGES_4 FOREIGN KEY (THUMBNAIL_ID) REFERENCES IMAGES (ID) ON DELETE SET NULL ON UPDATE CASCADE,
+    CONSTRAINT FK_IMAGES_4 FOREIGN KEY (THUMBNAIL_ID) REFERENCES IMAGES (ID) ON DELETE SET NULL ON UPDATE CASCADE
 );
 
 CREATE INDEX IMAGES_CHANNEL_STACK_IDX ON ACQUIRED_IMAGES(CHANNEL_STACK_ID);