Clean up tools/check error reporting. Remove logging.

Signed-off-by: Keir Fraser <keir@xensource.com>

tools/check/check_python

@@ -2,9 +2,9 @@
 # CHECK-BUILD CHECK-INSTALL
 
 function error {
-    echo "Check for Python version 2.2 or higher failed."
+    echo
+    echo "  *** Check for Python version >= 2.2 FAILED"
     exit 1
 }
 
-python -V
 python -V 2>&1 | cut -d ' ' -f 2 | grep -q -E '^2.2|^2.3|^2.4' || error