Remove added DBF tests from the Travis target.

Clozure doesn't have the CP866 encoding that the DBF files are using, and
then PostgreSQL 9.6 doesn't have "create schema if not exists", which makes
the tests fail on Travis.

test/Makefile

@@ -24,9 +24,6 @@ REGRESS= allcols.load 		    \
 	 copy.load                  \
 	 copy-hex.load              \
          dbf.load 		    \
-         dbf-memo.load 		    \
-         dbf-31.load 		    \
-         dbf-8b.load 		    \
          errors.load 		    \
          fixed.load 		    \
          fields-with-periods.load   \
@@ -37,6 +34,13 @@ REGRESS= allcols.load 		    \
          udc.load 		    \
          xzero.load
 
+# Those are not included in the tests because CCL doesn't have the cp866
+# encoding, and then PostgreSQL 9.6 lacks "create schema if not exists".
+#
+# dbf-memo.load
+# dbf-31.load
+# dbf-8b.load
+
 PGLOADER ?= ../build/bin/pgloader
 PGSUPERUSER ?= postgres