Revert "compatible with the commit 0ae2084"

This reverts commit 982166728a.

	modified:   pygeoapi/provider/postgresql.py
	modified:   requirements-provider.txt

pygeoapi/provider/postgresql.py

@@ -252,7 +252,7 @@ class PostgreSQLProvider(BaseProvider):
                 properties=properties, bbox=bbox)
 
             sql_query = SQL("DECLARE \"geo_cursor\" CURSOR FOR \
-             SELECT DISTINCT {},ST_AsGeoJSON({}) FROM {}{}").\
+             SELECT {},ST_AsGeoJSON({}) FROM {}{}").\
                 format(db.columns,
                        Identifier(self.geom),
                        Identifier(self.table),

requirements-provider.txt

@@ -1,4 +1,4 @@
 elasticsearch==7.1.0
 GDAL>=2.2,<3.0
-psycopg2-binary==2.7.6
+psycopg2==2.7.6
 pymongo