Fix broken test on windows

stringbuilder.cpp(160) : error C2666: 'operator +' : 2 overloads have similar conversions
stringbuilder.h(416): could be 'QStringBuilder<A,B> operator +<QByteArray,char[5]>(const A &,const B (&))'
            with
            [
                A=QByteArray,
                B=char [5]
            ]
            or       'built-in C++ operator+(__int64, char [5])'
            while trying to match the argument list '(QByteArray, char [5])'

The reason is the cast to QNoImplicitBoolCast (which is int)

1 files changed, 0 insertions, 4 deletions

diff --git a/tests/auto/qstringbuilder1/stringbuilder.cpp b/tests/auto/qstringbuilder1/stringbuilder.cpp
index 30d1ba3..3c8ddc2 100644
--- a/tests/auto/qstringbuilder1/stringbuilder.cpp
+++ b/tests/auto/qstringbuilder1/stringbuilder.cpp
@@ -155,10 +155,6 @@ void runScenario()
         const char *mmh = "test\0foo";
         QCOMPARE(QByteArray(ba P mmh P ba), testWith0);
 
-        char mmh2[5];
-        strncpy(mmh2, mmh, 5);
-        QCOMPARE(QByteArray(ba P mmh2 P ba), testWith0);
-
         QByteArray raw = QByteArray::fromRawData(UTF8_LITERAL_EXTRA, UTF8_LITERAL_LEN);
         QByteArray r = "hello" P raw;
         QByteArray r2 = "hello" UTF8_LITERAL;