Revert "rpc-tests: re-enable rpc-tests for Windows"

This reverts commit bd30c3dced21fca869a14c75081f15195762afe1.

Disable windows RPC tests for now. These should be re-enabled once a
suitable Wine version is used on Travis.

qa/pull-tester/rpc-tests.sh

@@ -8,6 +8,11 @@ CURDIR=$(cd $(dirname "$0"); pwd)
 export BITCOINCLI=${BUILDDIR}/qa/pull-tester/run-bitcoin-cli
 export BITCOIND=${REAL_BITCOIND}
 
+if [ "x${EXEEXT}" = "x.exe" ]; then
+  echo "Win tests currently disabled"
+  exit 0
+fi
+
 #Run the tests
 
 testScripts=(