Revert "Fix regression test failures in param-convesrions-test."

As we have applied a downstream patch for reverting the money type patch,
we need to also revert upstream test cases that are not supposed to be passing
in the first place.
This reverts commit eb480e19ee71b19de7f61013bdb4d5abd1cd98e4.

Related discussion:
http://www.postgresql.org/message-id/3259874.lgiBp3an9Y@nb.usersys.redhat.com
---

diff --git a/test/expected/param-conversions.out b/test/expected/param-conversions.out
index 777cc94..449a398 100644
--- a/test/expected/param-conversions.out
+++ b/test/expected/param-conversions.out
@@ -72,12 +72,12 @@ Error while executing the query
 
 Testing "SELECT 1.3 > ?" with SQL_C_CHAR -> SQL_FLOAT param "3', 'injected, BAD!', '1"...
 SQLExecDirect failed
-22P02=ERROR: invalid input syntax for type numeric: "3', 'injected, BAD!', '1";
+22P02=ERROR: invalid input syntax for type double precision: "3', 'injected, BAD!', '1";
 Error while executing the query
 
 Testing "SELECT 1.4 > ?" with SQL_C_CHAR -> SQL_FLOAT param "4 \'bad', '1"...
 SQLExecDirect failed
-22P02=ERROR: invalid input syntax for type numeric: "4 \'bad', '1";
+22P02=ERROR: invalid input syntax for type double precision: "4 \'bad', '1";
 Error while executing the query
 
 Testing "SELECT 1-?" with SQL_C_CHAR -> SQL_INTEGER param "-1"...