Remove CATCH_CONFIG_DISABLE_MATCHERS

Now that the recommended distribution and usage method is proper
library, users can just avoid including the matcher headers to get
basically the same effect.

tests/SelfTest/UsageTests/Compilation.tests.cpp

@@ -79,9 +79,7 @@ namespace { namespace CompilationTests {
         REQUIRE_THROWS(throws_int(true));
         CHECK_THROWS_AS(throws_int(true), int);
         REQUIRE_NOTHROW(throws_int(false));
-#ifndef CATCH_CONFIG_DISABLE_MATCHERS
         REQUIRE_THAT("aaa", Catch::EndsWith("aaa"));
-#endif
         return true;
     }
 

tests/SelfTest/UsageTests/Exception.tests.cpp

@@ -162,8 +162,6 @@ TEST_CASE("thrown std::strings are translated", "[.][failing][!throws]") {
 }
 
 
-#ifndef CATCH_CONFIG_DISABLE_MATCHERS
-
 TEST_CASE( "Exception messages can be tested for", "[!throws]" ) {
     using namespace Catch::Matchers;
     SECTION( "exact match" )
@@ -178,8 +176,6 @@ TEST_CASE( "Exception messages can be tested for", "[!throws]" ) {
     }
 }
 
-#endif
-
 TEST_CASE( "Mismatching exception messages failing the test", "[.][failing][!throws]" ) {
     REQUIRE_THROWS_WITH( thisThrows(), "expected exception" );
     REQUIRE_THROWS_WITH( thisThrows(), "should fail" );

tests/SelfTest/UsageTests/Matchers.tests.cpp

@@ -22,8 +22,6 @@
 
 namespace { namespace MatchersTests {
 
-#ifndef CATCH_CONFIG_DISABLE_MATCHERS
-
 #ifndef MATCHERS_TEST_HELPERS_INCLUDED // Don't compile this more than once per TU
 #define MATCHERS_TEST_HELPERS_INCLUDED
 
@@ -558,8 +556,6 @@ namespace { namespace MatchersTests {
 
 } } // namespace MatchersTests
 
-#endif // CATCH_CONFIG_DISABLE_MATCHERS
-
 #ifdef __clang__
 #pragma clang diagnostic pop
 #endif