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Now that GCC is compiled as C++11 there is no need to keep the C++03 implementation of gnu::unique_ptr. This removes the unique-ptr.h header and replaces it with <memory> in system.h, and changes the INCLUDE_UNIQUE_PTR macro to INCLUDE_MEMORY. Uses of gnu::unique_ptr and gnu::move can be replaced with std::unique_ptr and std::move. There are no uses of unique_xmalloc_ptr or xmalloc_deleter in GCC. gcc/analyzer/ChangeLog: * engine.cc: Define INCLUDE_MEMORY instead of INCLUDE_UNIQUE_PTR. gcc/c-family/ChangeLog: * known-headers.cc: Define INCLUDE_MEMORY instead of INCLUDE_UNIQUE_PTR. * name-hint.h: Likewise. (class name_hint): Use std::unique_ptr instead of gnu::unique_ptr. gcc/c/ChangeLog: * c-decl.c: Define INCLUDE_MEMORY instead of INCLUDE_UNIQUE_PTR. * c-parser.c: Likewise. gcc/cp/ChangeLog: * error.c: Define INCLUDE_MEMORY instead of INCLUDE_UNIQUE_PTR. * lex.c: Likewise. * name-lookup.c: Likewise. (class namespace_limit_reached): Use std::unique_ptr instead of gnu::unique_ptr. (suggest_alternatives_for): Use std::move instead of gnu::move. (suggest_alternatives_in_other_namespaces): Likewise. * parser.c: Define INCLUDE_MEMORY instead of INCLUDE_UNIQUE_PTR. gcc/ChangeLog: * Makefile.in: Remove unique-ptr-tests.o. * selftest-run-tests.c (selftest::run_tests): Remove unique_ptr_tests_cc_tests. * selftest.h (unique_ptr_tests_cc_tests): Remove. * system.h: Check INCLUDE_MEMORY instead of INCLUDE_UNIQUE_PTR and include <memory> instead of "unique-ptr.h". * unique-ptr-tests.cc: Removed. include/ChangeLog: * unique-ptr.h: Removed.