Drop constant merging check.

While without constant merging the profiler operates sub-optimally, it's
not that essential to be enabled. And there are problems with it on some
platforms, for example cygwin.

client/TracyProfiler.cpp

@@ -31,8 +31,6 @@ static moodycamel::ProducerToken& GetToken()
     return token;
 }
 
-extern const char* PointerCheckA;
-const char* PointerCheckB = "tracy";
 
 #ifndef TRACY_DISABLE
 Profiler s_profiler;
@@ -49,13 +47,6 @@ Profiler::Profiler()
     , m_buffer( new char[TargetFrameSize*3] )
     , m_bufferOffset( 0 )
 {
-    // This check verifies that the string literals from different compilation units are placed at the
-    // same address by the linker.
-    // MSVC: make sure "Enable String Pooling" is active (/GF).
-    // gcc: make sure -fmerge-constants is enabled (it is automatically enabled only in optimized builds).
-    // clang: seems to be enabled by default.
-    assert( PointerCheckA == PointerCheckB );
-
     assert( !s_instance );
     s_instance = this;
 

common/TracySystem.cpp

@@ -12,8 +12,6 @@
 namespace tracy
 {
 
-const char* PointerCheckA = "tracy";
-
 void SetThreadName( std::thread& thread, const char* name )
 {
 #ifdef _WIN32