Fix unused variable errors (#5843)

Signed-off-by: Steve Pham <82231385+spham-amzn@users.noreply.github.com>

Gems/Atom/Asset/ImageProcessingAtom/Code/Source/BuilderSettings/BuilderSettingManager.cpp

@@ -52,7 +52,7 @@ namespace ImageProcessingAtom
 
     namespace
     {
-        static constexpr const char* const LogWindow = "Image Processing";
+        [[maybe_unused]] static constexpr const char* const LogWindow = "Image Processing";
     }
 
 #if defined(AZ_TOOLS_EXPAND_FOR_RESTRICTED_PLATFORMS)

Gems/QtForPython/Code/Source/Platform/Linux/InitializeEmbeddedPyside2.h

@@ -38,7 +38,7 @@ namespace QtForPython
             void* moduleHandle = dlopen(moduleToLoad, RTLD_NOW | RTLD_GLOBAL);
             if (!moduleHandle)
             {
-                const char* loadError = dlerror();
+                [[maybe_unused]] const char* loadError = dlerror();
                 AZ_Error("QtForPython", false, "Unable to load python library %s for Pyside2: %s", moduleToLoad,
                          loadError ? loadError : "Unknown Error");
             }