Fix gcc warning in tests

tests/classic_src/AbsBeamline/RingTest.cpp

@@ -37,15 +37,6 @@
 #include <iostream>
 #include <sstream>
 
-namespace {
-    std::string burnAfterReading(std::ostringstream &ostr) {
-        std::string returnValue = ostr.str();
-        ostr.str("");
-
-        return returnValue;
-    }
-}
-
 // generate a set of weird, but closed, elements
 // reaches theta sum after 16 elements
 class OffsetFactory {

tests/opal_src/Distribution/GaussTest.cpp

@@ -25,15 +25,6 @@ Inform *gmsg;
 #include <cstring>
 #include <sstream>
 
-namespace {
-    std::string burnAfterReading(std::ostringstream &ostr) {
-        std::string returnValue = ostr.str();
-        ostr.str("");
-
-        return returnValue;
-    }
-}
-
 TEST(GaussTest, FullSigmaTest1) {
     OpalTestUtilities::SilenceTest silencer(true);
     char inputFileName[] = "GaussDistributionTest.in";