Remove unused headers and variables from libstdc++ tests

	* testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc: Remove
	unused header and variable from compile-only test.
	* testsuite/20_util/shared_ptr/assign/unique_ptr_rvalue.cc: Likewise.
	* testsuite/28_regex/basic_regex/assign/char/cstring.cc: Likewise.
	* testsuite/28_regex/basic_regex/ctors/string_wchar_t.cc: Likewise.
	* testsuite/experimental/memory/shared_ptr/cons/copy_ctor_neg.cc:
	Likewise.

From-SVN: r238943

libstdc++-v3/ChangeLog

 2016-08-01  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc: Remove
+	unused header and variable from compile-only test.
+	* testsuite/20_util/shared_ptr/assign/unique_ptr_rvalue.cc: Likewise.
+	* testsuite/28_regex/basic_regex/assign/char/cstring.cc: Likewise.
+	* testsuite/28_regex/basic_regex/ctors/string_wchar_t.cc: Likewise.
+	* testsuite/experimental/memory/shared_ptr/cons/copy_ctor_neg.cc:
+	Likewise.
+
 	* testsuite/experimental/string_view/operations/rfind/char/2.cc:
 	Remove duplicate dg-options directive.
 

libstdc++-v3/testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc

@@ -21,7 +21,6 @@
 // 20.7.12.2 Template class shared_ptr [util.smartptr.shared]
 
 #include <memory>
-#include <testsuite_hooks.h>
 
 struct A { };
 std::auto_ptr<A> source() { return std::auto_ptr<A>(); }
@@ -29,27 +28,19 @@ std::auto_ptr<A> source() { return std::auto_ptr<A>(); }
 // 20.7.12.2.3 shared_ptr assignment [util.smartptr.shared.assign]
 
 // Assignment from rvalue auto_ptr
-int
+void
 test01()
 {
-  bool test __attribute__((unused)) = true;
-
   std::shared_ptr<A> a;
   a = source();
-
-  return 0;
 }
 
-int
+void
 test02()
 {
-  bool test __attribute__((unused)) = true;
-
   std::shared_ptr<A> a;
   std::auto_ptr<A> au;
   a = std::move(au);
-
-  return 0;
 }
 
 int 

libstdc++-v3/testsuite/20_util/shared_ptr/assign/unique_ptr_rvalue.cc

@@ -21,7 +21,6 @@
 // 20.7.12.2 Template class shared_ptr [util.smartptr.shared]
 
 #include <memory>
-#include <testsuite_hooks.h>
 
 struct A { };
 std::unique_ptr<A> source() { return std::unique_ptr<A>(); }
@@ -29,27 +28,19 @@ std::unique_ptr<A> source() { return std::unique_ptr<A>(); }
 // 20.7.12.2.3 shared_ptr assignment [util.smartptr.shared.assign]
 
 // Assignment from rvalue unique_ptr
-int
+void
 test01()
 {
-  bool test __attribute__((unused)) = true;
-
   std::shared_ptr<A> a;
   a = source();
-
-  return 0;
 }
 
-int
+void
 test02()
 {
-  bool test __attribute__((unused)) = true;
-
   std::shared_ptr<A> a;
   std::unique_ptr<A> u;
   a = std::move(u);
-
-  return 0;
 }
 
 int 

libstdc++-v3/testsuite/28_regex/basic_regex/assign/char/cstring.cc

@@ -22,13 +22,10 @@
 // C++0X [28.8.3] class template basic_regex assign()
 
 #include <regex>
-#include <testsuite_hooks.h>
 
 // Tests assign operation from a C-style null-terminated-string.  
 void test01()
 {
-  bool test __attribute__((unused)) = true;
-
   std::basic_regex<char> re;
 
   const char* cs = "aab";

libstdc++-v3/testsuite/28_regex/basic_regex/ctors/string_wchar_t.cc

@@ -24,7 +24,6 @@
 
 #include <string>
 #include <regex>
-#include <testsuite_hooks.h>
 #include <testsuite_allocator.h>
 
 // Tests C++ string constructor of the basic_regex class.  
@@ -39,7 +38,6 @@ void test01()
 
 void test02()
 {
-  bool test __attribute__((unused)) = true;
   typedef std::basic_regex<wchar_t> test_type;
   typedef __gnu_test::tracker_allocator<wchar_t> alloc_type;
 

libstdc++-v3/testsuite/experimental/memory/shared_ptr/cons/copy_ctor_neg.cc

@@ -21,7 +21,6 @@
 // 8.2.1 Class template shared_ptr [memory.smartptr.shared]
 
 #include <experimental/memory>
-#include <testsuite_hooks.h>
 
 struct A { virtual ~A() { } };
 struct B : A { };
@@ -34,8 +33,6 @@ struct B : A { };
 void
 test01()
 {
-  bool test __attribute__((unused)) = true;
-
   std::experimental::shared_ptr<A[3]> a;
   a = std::experimental::shared_ptr<B[3]> (new B[3]); // { dg-error "no match " }
 }
@@ -43,8 +40,6 @@ test01()
 void
 test02()
 {
-  bool test __attribute__((unused)) = true;
-
   std::experimental::shared_ptr<A[]> a(new A[3]);
   std::experimental::shared_ptr<A[2]> spa(a); // { dg-error "no matching" }
 }