build: pkg anti-pattern: use defaults

Use the defaults in the pkg check where the default error message is
sufficient to identify which package is missing.

Change-Id: Ifdc864ea0d821ab4f1cff2be2a270317e25b801f
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/configure.ac b/configure.ac
index b1e9527..26cf79b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -19,10 +19,10 @@
 LT_INIT
 
 # Check for needed modules
-PKG_CHECK_MODULES([PHOSPHOR_LOGGING], [phosphor-logging], [], [AC_MSG_ERROR([Could not find phosphor-logging...openbmc/phosphor-logging package required])])
-PKG_CHECK_MODULES([SDBUSPLUS], [sdbusplus],, [AC_MSG_ERROR([Could not find sdbusplus...openbmc/sdbusplus package required])])
-PKG_CHECK_MODULES([SDEVENTPLUS], [sdeventplus],, [AC_MSG_ERROR([Could not find sdeventplus...openbmc/sdeventplus package required])])
-PKG_CHECK_MODULES([PHOSPHOR_DBUS_INTERFACES], [phosphor-dbus-interfaces], [], [AC_MSG_ERROR([Could not find phosphor-dbus-interfaces...openbmc/phosphor-dbus-interfaces package required])])
+PKG_CHECK_MODULES([PHOSPHOR_LOGGING], [phosphor-logging])
+PKG_CHECK_MODULES([SDBUSPLUS], [sdbusplus])
+PKG_CHECK_MODULES([SDEVENTPLUS], [sdeventplus])
+PKG_CHECK_MODULES([PHOSPHOR_DBUS_INTERFACES], [phosphor-dbus-interfaces])
 PKG_CHECK_MODULES([GTEST_MAIN], [gtest_main], [],
     [
         AX_PTHREAD([GTEST_MAIN_CFLAGS="-DGTEST_HAS_PTHREAD=1"],[GTEST_MAIN_CFLAGS="-DGTEST_HAS_PTHREAD=0"])