[patch] Remove duplicate libstdc++ tests

[Jonathan Wakely]

I noticed that testsuite/30_threads/shared_lock/modifiers/2.cc is
almost identical to 1.cc in the same directory, except for the diff
shown in the attached patch. That file was copied from
testsuite/30_threads/unique_lock/modifiers/2.cc which is almost
identical to 1.cc in that directory.

So I'm applying the attached patch to remove the unused variable name,
and deleting the duplicate tests.

Tested x86_64-linux, committed to trunk.


commit 0fbc10a08ea44dc6cf8c503b3e18899aecac0cc9
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Tue Mar 17 16:24:41 2015 +0000

    	* testsuite/30_threads/shared_lock/modifiers/1.cc: Remove name of
    	unused exception variable.
    	* testsuite/30_threads/unique_lock/modifiers/1.cc: Likewise.
    	* testsuite/30_threads/shared_lock/modifiers/2.cc: Remove duplicate
    	test.
    	* testsuite/30_threads/unique_lock/modifiers/2.cc: Likewise.

diff --git a/libstdc++-v3/testsuite/30_threads/shared_lock/modifiers/1.cc b/libstdc++-v3/testsuite/30_threads/shared_lock/modifiers/1.cc
index 2d61582..9f20039 100644
--- a/libstdc++-v3/testsuite/30_threads/shared_lock/modifiers/1.cc
+++ b/libstdc++-v3/testsuite/30_threads/shared_lock/modifiers/1.cc
@@ -55,7 +55,7 @@ int main()
       VERIFY( !(bool)l1 );
       VERIFY( (bool)l2 );
     }
-  catch (const std::system_error& e)
+  catch (const std::system_error&)
     {
       VERIFY( false );
     }
diff --git a/libstdc++-v3/testsuite/30_threads/unique_lock/modifiers/1.cc b/libstdc++-v3/testsuite/30_threads/unique_lock/modifiers/1.cc
index 917b0fb..ffb9fe4 100644
--- a/libstdc++-v3/testsuite/30_threads/unique_lock/modifiers/1.cc
+++ b/libstdc++-v3/testsuite/30_threads/unique_lock/modifiers/1.cc
@@ -55,7 +55,7 @@ int main()
       VERIFY( !(bool)l1 );
       VERIFY( (bool)l2 );
     }
-  catch (const std::system_error& e)
+  catch (const std::system_error&)
     {
       VERIFY( false );
     }